select发展史超强

作者：marvellous
本文旨在大家对select和模拟select有一个全面地了解,使此项技术能发挥出更高的水平。
最初的select的确很平淡,就是一个下拉选项列表:

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

日久天长之后,人们对select要求高了,要修一修边幅:

<html> 
<head> 
<title>Untitled Document</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<style> 
.table1{background-color:white;FONT-FAMILY: Courier New, Courier;font-size:12px} 
.td_out{FONT-FAMILY: Courier New, Courier;font-size:12px;color:#000000;height:15px;border:1 solid #ffffff;} 
.td_over{FONT-FAMILY: Courier New, Courier;font-size:12px;cursor:default;background-color:#3366cc;border:1 solid #000000;color:#ffffff;height:15px} 
.slv{vertical-align:bottom;FONT-FAMILY: Courier New, Courier;font-size:12px;border-left-width:0;border-top-width:0;border-bottom-width:0;border-right:0 solid #000000;vertical-align:middle;height:18px;color:#000000;} 
.down{position:relative;left:-2px;font-size:11px;vertical-align:middle;width:16;height:16;color:#2050b0;background-color:#D0DFF7;border:1 solid #9fA3Ce;writing-mode:tb-rl;font-weight:bold; 
} 
.seldiv{ 
position:absolute;z-index:1000;overflow-x:hidden;border-left:1 solid #000000;border-bottom:1 solid #000000;border-right:1 solid #000000; 
SCROLLBAR-FACE-COLOR: #d0dff7;  
SCROLLBAR-HIGHLIGHT-COLOR: #d0dff7;  
SCROLLBAR-SHADOW-COLOR: #FFFFFF;  
SCROLLBAR-3DLIGHT-COLOR: #FFFFFF;  
SCROLLBAR-ARROW-COLOR: #ffffff;  
SCROLLBAR-TRACK-COLOR: #ffffff;  
SCROLLBAR-DARKSHADOW-COLOR: #d0dff7;} 
</style> 
<script language="JavaScript"> 
document.onclick=hiddenDiv; 
function getDivCount() { 
 var arr=document.all;  
 re=0; 
 for (i=0;i<arr.length;i++) { 
  str=arr[i].id;   
  if (str.indexOf("ZfDiv_")==0) {    
   re++;   
  } 
 }  
 return re; 
}

function getI(ObjId) {//取得objId的最后一位数字 
 for (i=0;i<ObjId.length;i++) { 
  if (ObjId.charAt(i)=="_") return ObjId.substr(i+1,ObjId.length-1); 
 } 
 return 0; 
}

function select_edit(TextObj){//鼠标经过高亮度  
 TextObj.focus();TextObj.select(); 
}

function checkValue(ID){    
 var sl=document.all["ZfText_"+ID];  
 var sv=document.all["ZfDiv_"+ID]; 
 var da=document.all["ZfData_"+ID];    
 sv.style.display='' 
  
 for(i=0;i<da.rows.length;i++)da.rows[i].style.display='' 
  
 for(i=0;i<da.rows.length;i++){ 
  if(da.rows[i].cells[0].innerText.indexOf(sl.value)!=0)da.rows[i].style.display='none'; 
  getPosition(ID); 
 }  
}

function hiddenDiv(){ 
 var o=window.event.srcElement.id; 
 var tb  
 var sv  
 if(o=="") { 
  for (j=0;j<getDivCount();j++) { 
   tb=document.getElementById('ZfData_'+j); 
   sv=document.getElementById('ZfDiv_'+j);    
   for(i=0;i<tb.rows.length;i++) tb.rows[i].style.display=''; 
   sv.style.display='none';    
  } 
   
 }

}//隐藏模拟层

function setValue(obj){ 
var i=getI(obj.parentElement.parentElement.parentElement.id); 
//alert(obj.parentElement.parentElement.parentElement.id);

var sl=document.all["ZfText_"+i]; 
var sv=document.all['ZfDiv_'+i]; 
sl.value=obj.innerText; 
sv.style.display='none'; 
//sldIndex=obj.parentElement.rowIndex; 
}//给文本框赋值

function over(obj){ 
 obj.className="td_over" 
 obj.title=obj.innerText 
 obj.focus(); 
}//鼠标经过变色

function out(obj){ 
 obj.className="td_out" 
}//鼠标离开还原

function String.prototype.Trim(){return this.replace(/(^\s*)|(\s*$)/g,'')}//自定义去空格函数Trim()

//增加list的接口,ID表示该组控件是页面中的第几个 
function add(v,ID){ 
var sv=document.all['ZfDiv_'+ID]; 
if(!v.Trim()){return;} 
var tb=document.all['ZfData_'+ID]; 
var c=tb.insertRow(tb.rows.length).insertCell(); 
c.innerHTML='<nobr>'+v.Trim()+'</nobr>'; 
c.onmouseover=new Function("over(this)"); 
c.onmouseout=new Function("out(this)"); 
c.onclick=new Function("setValue(this)"); 
c.className="td_out"; 
v=''; 
} 
//增加inpnubox的接口,在页面中产生一个inputbox控件,下拉列表为空 
function addText(name,DefValue) { 
 var i=getDivCount(); 
 document.write('<span id="ZfSpan_'+i+'" style="border:1 solid #9CA0CB">'); 
 document.write('<input type="text" value="'+DefValue+'" name="'+name+'" id="ZfText_'+i+'" ondblclick="ZfDrop_'+i+'.click()" class="slv" onmouseover="select_edit(this)"  onkeyup="checkValue('+i+')"><input type=button id="ZfDrop_'+i+'" value=">" onclick="this.hideFocus=true;dropDown('+i+');" class="down" onmouseover="this.style.backgroundColor=#EEF3FD" onmouseout="this.style.backgroundColor=\'\'" onmousedown="this.style.backgroundColor=#ABC4F5" onmouseup="this.style.backgroundColor=\'\'"></span>'); 
 document.write('<div id="ZfDiv_'+i+'" class="seldiv" style="display:none;"><table id="ZfData_'+i+'" onselectstart="return false" border="0"  cellspacing="0" cellpadding="0" class="table1"></table></div>'); 
}

</script> 
</head> 
<body>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

要加一些链接,变成菜单:

<STYLE> 
body { cursor: url(http://vip.6to23.com/candylau/image/xiucursor.cur)} 
</STYLE>

dropdown = el.children[1];

if (size != null) { 
        if (size > 1) { 
            el.size = size; 
            dropdown.style.zIndex = 0; 
            initSized(el); 
        } 
        else { 
            el.size = 1; 
            dropdown.style.zIndex = 99; 
            if (dropdown.offsetHeight > 200) { 
                dropdown.style.height = "200"; 
                dropdown.style.overflow = "auto"; 
            } 
        } 
    } 
     
    highlightSelected(el,true); 
}

function int_remove(el,i) { 
    if (el.options[i] != null) 
        el.options[i].outerHTML = ""; 
}

function int_add(el, e, i) { 
    var html = "<div class='option' noWrap"; 
    if (e.value != null) 
        html += " value='" + e.value + "'"; 
    if (e.style.cssText != null) 
        html += " style='" + e.style.cssText + "'"; 
    html += ">"; 
    if (e.text != null) 
        html += e.text; 
    html += "</div>"

if ((i == null) || (i >= el.options.length)) 
        i = el.options.length-1; 
    el.options[i].insertAdjacentHTML("AfterEnd", html); 
} 
     
function initSized(el) { 
    var h = 0; 
    el.children[0].style.display = "none"; 
    dropdown = el.children[1]; 
    dropdown.style.visibility = "visible";

if (dropdown.children.length > el.size) { 
        dropdown.style.overflow = "auto"; 
        for (var i=0; i<el.size; i++) { 
            h += dropdown.children[i].offsetHeight; 
        }

if (dropdown.style.borderWidth != null) { 
            dropdown.style.pixelHeight = h + 4; 
        }

else 
            dropdown.style.height = h; 
    }

dropdown.style.border = sizedBorderCss; 
    el.style.height = dropdown.style.pixelHeight; 
}

function copySelected(el) { 
    var selectedIndex = findSelected(el); 
    selectedCell = el.children[0].rows[0].cells[0]; 
    selectedDiv  =     el.children[1].children[selectedIndex]; 
    selectedCell.innerHTML = selectedDiv.outerHTML; 
}

function findSelected(el) { 
    var selected = null;

ec = el.children[1].children; 
    var ecl = ec.length; 
     
    for (var i=0; i<ecl; i++) { 
        if (ec[i].getAttribute("selected") != null) { 
            if (selected == null) { 
                selected = i; 
            } 
            else 
                ec[i].removeAttribute("selected"); 
        } 
    } 
    if (selected == null) 
        selected = 0;

return selected; 
}

function toggleDropDown(el) { 
    if (el.size == 1) { 
        dropDown = el.children[1]; 
         
        if (dropDown.style.visibility == "") 
            dropDown.style.visibility = "hidden"; 
             
        if (dropDown.style.visibility == "hidden") 
            showDropDown(dropDown); 
        else 
            hideDropDown(dropDown); 
    } 
}

function optionClick() { 
    el = getReal(window.event.srcElement, "className", "option");

if (el.className == "option") { 
        dropdown  = el.parentElement; 
        selectBox = dropdown.parentElement; 
        oldSelected = dropdown.children[findSelected(selectBox)]

if(oldSelected != el) { 
            oldSelected.removeAttribute("selected"); 
            el.setAttribute("selected", 1); 
            selectBox.selectedIndex = findSelected(selectBox); 
        }

if (selectBox.onchange != null) { 
            if (selectBox.id != "") { 
                eval(selectBox.onchange.replace(/this/g, selectBox.id)); 
            } 
            else { 
                globalSelect = selectBox; 
                eval(selectBox.onchange.replace(/this/g, "globalSelect")); 
            } 
        }

if (el.backupCss != null) 
        el.style.cssText = el.backupCss; 
        copySelected(selectBox); 
        toggleDropDown(selectBox); 
        highlightSelected(selectBox, true); 
    } 
}

function optionOver() { 
    var toEl = getReal(window.event.toElement, "className", "option"); 
    var fromEl = getReal(window.event.fromElement, "className", "option"); 
    if (toEl == fromEl) return; 
    var el = toEl; 
    if (el.className == "option") { 
        if (el.backupCss == null) 
            el.backupCss = el.style.cssText; 
        highlightSelected(el.parentElement.parentElement, false); 
        el.style.cssText = el.backupCss + "; " + overOptionCss; 
        this.highlighted = true; 
    } 
}

if (el.className == "option") { 
        if (el.backupCss != null) 
            el.style.cssText = el.backupCss; 
    }

}

function hideDropDown(el) { 
    if (typeof(fade) == "function") 
    fade(el, false); 
    else 
    el.style.visibility = "hidden"; 
}

function showDropDown(el) { 
    if (typeof(fade) == "function") 
    fade(el, true); 
    else if (typeof(swipe) == "function") 
    swipe(el, 2); 
    else 
    el.style.visibility = "visible"; 
}

function initSelectBoxes() { 
var spans = document.all.tags("SPAN"); 
var selects = new Array(); 
var index = 0;

for (var i=0; i<spans.length; i++) { 
if (spans[i].className == "select") 
selects[index++] = spans[i]; 
} 
for (var j=0; j<selects.length; j++) { 
initSelectBox(selects[j]); 
}     
}

function createIEString(matrix, id, size, onchange, css) { 
    var str = ""; 
        str += '<span class="select"'; 
        if (size == null) 
            size = 1; 
        str += ' size="' + size + '"';     
        if (id != null) 
            str += ' id="' + id + '"'; 
        if (onchange != null) 
            str += ' onchange="' + onchange + '"'; 
        if (css != null) 
        str += ' style="' + css + '"'; 
        str += '>\n'; 
        str += '<table class="selectTable" cellspacing="0" cellpadding="0"\n'; 
        str += ' onclick="toggleDropDown(this.parentElement)">\n'; 
        str += '<tr>\n'; 
        str += '<td class="selected"> </td>\n'; 
        str += '<td align="CENTER" valign="MIDDLE" class="Button"\n'; 
        str += ' onmousedown="this.style.border=\'2 inset buttonhighlight\'"\n'; 
        str += ' onmouseup="this.style.border=\'2 outset buttonhighlight\'">\n'; 
        str += '<span style="position: relative; left: 0; top: -2; width: 100%;">6</span></td>\n'; 
        str += '</tr>\n'; 
        str += '</table>\n'; 
        str += '<div class="dropDown" onclick="optionClick()" onmouseover="optionOver()" onmouseout="optionOut()">\n'; 
         
        for (var i=0; i<matrix.length; i++) { 
            html     = matrix[i].html; 
            value    = matrix[i].value; 
            css      = matrix[i].css; 
            selected = matrix[i].selected; 
            str += '<div class="option"'; 
            if (value != null) 
                str += ' value="' + value + '"'; 
            if (css != null) 
                str += ' style="' + css + '"'; 
            if (selected != null) 
                str += ' selected'; 
            str += '>\n'; 
            str += html; 
            str += '</div>\n'; 
        } 
        str += '</div>\n'; 
        str += '</span>\n'; 
    return str; 
}

function createXString(matrix, id, size, onchange, css) { 
var str = '<form>\n'; 
str += '<select'; 
if (size == null) 
    size = 1; 
str += ' size="' + size + '"';     
if (id != null) 
    str += ' id="' + id + '"'; 
if (onchange != null) 
    str += ' onchange="' + onchange + '"'; 
str += '>\n';

for (var i=0; i<matrix.length; i++) { 
    html     = matrix[i].html; 
    value    = matrix[i].value; 
    css      = matrix[i].css; 
    selected = matrix[i].selected; 
    str += '\n<option'; 
    if (value != null) 
    str += ' value="' + value + '"'; 
    if (selected != null) 
        str += ' selected'; 
    str += '>'; 
    str += stripTags(html); 
    str += '</option>\n'; 
    } 
    str += '\n</select>\n'; 
    str += '</form>\n'; 
return str; 
}

function stripTags(str) { 
    var s = 0; 
    var e = -1; 
    var r = ""; 
    s = str.indexOf("<",e);     
    do { 
        r += str.substring(e + 1,s); 
        e = str.indexOf(">",s); 
        s = str.indexOf("<",e); 
    } 
    while ((s != -1) && (e != -1)) 
    r += str.substring(e + 1,str.length); 
    return r; 
}

function Option(html, value, css, selected) { 
    this.html = html; 
    this.value = value; 
    this.css = css; 
    this.selected = selected; 
} 
</script> 
<script type="text/javascript"> 
var optionArray = new Array(); 
optionArray[0] = new Option("Item 1", "value 1", "color: blue; text-decoration: underline;"); 
optionArray[1] = new Option("Item <b>2</b>", "value 2"); 
optionArray[2] = new Option("Item 3", "value 3", "color: red;", "selected"); 
optionArray[3] = new Option("Item 4", "value 4"); 
optionArray[4] = new Option("Item 5", "value 5"); 
writeSelectBox(optionArray, "select1", 1, "alert(this.options[this.selectedIndex].value)", "margin-left: 10;"); 
</script>

<select onchange="if(this.options[this.selectedIndex].value!=''){location=this.options[this.selectedIndex].value;}" > 
<option value="http://www.163.com">网易</option> 
<option value="http://www.google.com">google</option> 
<option value="http://wwwsohu.com">搜狐</option> 
</select>

<form> 
<select size="1" name="D1" onchange=if(s=document.getElementById("S1")){s.style.backgroundColor=value}> 
<option selected value="white">请选择颜色</option> 
<option value="red">红色</option> 
<option value="blue">蓝色</option> 
<option value="green">绿色</option> 
</select>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

mMenu.prototype.addItem = mMenuAddItem; 
function mtoout(src){

src.style.borderLeftColor=mmenuoutbordercolor; 
src.style.borderRightColor=mmenuinbordercolor; 
src.style.borderTopColor=mmenuoutbordercolor; 
src.style.borderBottomColor=mmenuinbordercolor; 
src.style.backgroundColor=mmenuoutcolor; 
src.style.color=mmenuovercolor; 
} 
function mtoin(src){

src.style.borderLeftColor=mmenuinbordercolor; 
src.style.borderRightColor=mmenuoutbordercolor; 
src.style.borderTopColor=mmenuinbordercolor; 
src.style.borderBottomColor=mmenuoutbordercolor; 
src.style.backgroundColor=mmenuincolor; 
src.style.color=mmenuovercolor; 
} 
function mnochange(src){ 
src.style.borderLeftColor=mmenucolor; 
src.style.borderRightColor=mmenucolor; 
src.style.borderTopColor=mmenucolor; 
src.style.borderBottomColor=mmenucolor; 
src.style.backgroundColor=''; 
src.style.color=mfontcolor;

} 
function mallhide(){ 
    for(var nummenu=0;nummenu<mmenus.length;nummenu++){ 
        var themenu=document.all['mMenu'+nummenu] 
        var themenudiv=document.all['mmenudiv'+nummenu] 
                mnochange(themenu); 
                mmenuhide(themenudiv); 
                } 
} 
function mmenuhide(menuid){

hideSwipe(menuid); 
misShow=false; 
} 
function mmenushow(menuid,pid){

menuid.style.left=mmenutable.offsetLeft+pid.offsetLeft+mmenuadjust;menuid.style.top=mmenutable.offsetTop-menuid.offsetHeight+mmenuadjustV; 
if(mmenuitemwidth+parseInt(menuid.style.left)>document.body.clientWidth+document.body.scrollLeft) 
menuid.style.left=document.body.clientWidth+document.body.scrollLeft-mmenuitemwidth; 
mtmpleft=menuid.style.left;mtmptop=menuid.style.top;swipe(menuid,8,4); 
misShow=true; 
} 
function mmenu_over(menuid,x){ 
toel = getReal(window.event.toElement, "className", "coolButton"); 
fromel = getReal(window.event.fromElement, "className", "coolButton"); 
if (toel == fromel) return; 
if(x==4){ 
  misShow = false; 
  mallhide(); 
  mtoout(eval("mMenu"+x)); 
}else{ 
if(!misShow){mtoout(eval("mMenu"+x));}else{ 
  mallhide(); 
  mtoin(eval("mMenu"+x)); 
  mmenushow(menuid,eval("mMenu"+x)); 
} 
}

} 
function mmenu_out(x){ 
toel = getReal(window.event.toElement, "className", "coolButton"); 
fromel = getReal(window.event.fromElement, "className", "coolButton"); 
if (toel == fromel) return; 
if (misShow){ 
mtoin(eval("mMenu"+x)); 
}else{ 
mnochange(eval("mMenu"+x)); 
}

} 
function mmenu_down(menuid,x){ 
  if(misShow){ 
  mmenuhide(menuid); 
  mtoout(eval("mMenu"+x)); 
  } 
  else{ 
  mtoin(eval("mMenu"+x)); 
  mmenushow(menuid,eval("mMenu"+x)); 
  misdown=true; 
  } 
} 
function mmenu_up(){ 
  misdown=false; 
} 
function mmenuitem_over(x,i){ 
srcel = getReal(window.event.srcElement, "className", "coolButton"); 
if(misdown){ 
    mtoin(srcel); 
} 
else{ 
mtoout(srcel); 
} 
mthestatus = mmenus[x].items[i].statustxt; 
if(mthestatus!=""){ 
    musestatus=true; 
    window.status=mthestatus; 
}

} 
function mmenuitem_out(){ 
srcel = getReal(window.event.srcElement, "className", "coolButton"); 
mnochange(srcel); 
if(musestatus)window.status="";

} 
function mmenuitem_down(){ 
srcel = getReal(window.event.srcElement, "className", "coolButton"); 
mtoin(srcel) 
misdown=true; 
} 
function mmenuitem_up(){ 
srcel = getReal(window.event.srcElement, "className", "coolButton"); 
mtoout(srcel) 
misdown=false; 
} 
function mexec2(x){ 
var cmd; 
if(mmenus[x].target=="blank"){ 
  cmd = "window.open('"+mmenus[x].command+"')"; 
}else{ 
  cmd = mmenus[x].target+".location=\""+mmenus[x].command+"\""; 
} 
eval(cmd); 
} 
function mexec(x,i){ 
var cmd; 
if(mmenus[x].items[i].target=="blank"){ 
  cmd = "window.open('"+mmenus[x].items[i].command+"')"; 
}else{ 
  cmd = mmenus[x].items[i].target+".location=\""+mmenus[x].items[i].command+"\""; 
} 
eval(cmd); 
} 
function mbody_click(){

if (misShow){ 
    srcel = getReal(window.event.srcElement, "className", "coolButton"); 
    for(var x=0;x<=mmenus.length;x++){ 
        if(srcel.id=="mMenu"+x) 
        return; 
    } 
    mallhide(); 
} 
} 
document.onclick=mbody_click; 
function mwritetodocument(){ 
      var mwb=1; 
                     var stringx='<table  id=mmenutable border=0 cellpadding=3 cellspacing=2 width='+mmenuwidth+' height='+mmenuheight+' bgcolor='+mmenucolor+ 
                     ' onselectstart="event.returnValue=false"'+ 
                     ' style="position:absolute;cursor:'+mcursor+';'+mfonts+ 
                     ' border-left: '+mwb+'px solid '+mmenuoutbordercolor+';'+ 
                     ' border-right: '+mwb+'px solid '+mmenuinbordercolor+'; '+ 
                     'border-top: '+mwb+'px solid '+mmenuoutbordercolor+'; '+ 
                     'border-bottom: '+mwb+'px solid '+mmenuinbordercolor+'; padding:0px"><tr>' 
                     for(var x=0;x<mmenus.length;x++){ 
                         var thismenu=mmenus[x]; 
                         var imgsize=""; 
                         if(thismenu.sizex!="0"||thismenu.sizey!="0")imgsize=" width="+thismenu.sizex+" height="+thismenu.sizey; 
                         var ifspace=""; 
                         if(thismenu.caption!="")ifspace=" "; 
                         stringx += "<td nowrap class=coolButton id=mMenu"+x+" style='border: "+mitemedge+"px solid "+mmenucolor+ 
                         "' width="+mmenuunitwidth+"px onmouseover=mmenu_over(mmenudiv"+x+ 
                         ","+x+") onmouseout=mmenu_out("+x+ 
                         ") onmousedown=mmenu_down(mmenudiv"+x+","+x+")"; 
                               if(thismenu.command!=""){ 
                                   stringx += " onmouseup=mmenu_up();mexec2("+x+");"; 
                               }else{ 
                                     stringx += " onmouseup=mmenu_up()"; 
                               } 
                               if(thismenu.pos=="0"){ 
                                   stringx += " align=center>"+ifspace+thismenu.caption+"</td>";     
                               }else if(thismenu.pos=="1"){ 
                                   stringx += " align=center>"+thismenu.caption+ifspace+"</td>";     
                               }else if(thismenu.pos=="2"){ 
                                   stringx += " align=center background='"+thismenu.img+"'> "+thismenu.caption+" </td>";     
                               }else{ 
                                   stringx += " align=center> "+thismenu.caption+" </td>"; 
                               } 
                         stringx += ""; 
                     } 
                     stringx+="<td width=*> </td></tr></table>"; 
                      
                      
                     for(var x=0;x<mmenus.length;x++){ 
                         thismenu=mmenus[x]; 
                        if(x==4){ 
                        stringx+='<div id=mmenudiv'+x+' style="visiable:none"></div>'; 
                        }else{ 
                        stringx+='<div id=mmenudiv'+x+ 
                        ' style="cursor:'+mcursor+';position:absolute;'+ 
                        'width:'+mmenuitemwidth+'px; z-index:'+(x+100); 
                        if(mmenuinbordercolor!=mmenuoutbordercolor&&msubedge=="0"){ 
                        stringx+=';border-left: 1px solid '+mmidoutcolor+ 
                        ';border-top: 1px solid '+mmidoutcolor;} 
                        stringx+=';border-right: 1px solid '+mmenuinbordercolor+ 
                        ';border-bottom: 1px solid '+mmenuinbordercolor+';visibility:hidden" onselectstart="event.returnValue=false">\n'+ 
                         '<table  width="100%" border="0" height="100%" align="center" cellpadding="0" cellspacing="2" '+ 
                         'style="'+mfonts+' border-left: 1px solid '+mmenuoutbordercolor; 
                        if(mmenuinbordercolor!=mmenuoutbordercolor&&msubedge=="0"){ 
                         stringx+=';border-right: 1px solid '+mmidincolor+ 
                         ';border-bottom: 1px solid '+mmidincolor;} 
                         stringx+=';border-top: 1px solid '+mmenuoutbordercolor+ 
                         ';padding: 4px" bgcolor='+mmenucolor+'>\n' 
                         for(var i=0;i<thismenu.items.length;i++){ 
                             var thismenuitem=thismenu.items[i]; 
                             var imgsize=""; 
                                 if(thismenuitem.sizex!="0"||thismenuitem.sizey!="0")imgsize=" width="+thismenuitem.sizex+" height="+thismenuitem.sizey; 
                                 var ifspace=""; 
                                 if(thismenu.caption!="")ifspace=" "; 
                             if(!thismenuitem.isline){ 
                             stringx += "<tr><td class=coolButton style='border: "+mitemedge+"px solid "+mmenucolor+ 
                             "' width=100% height=15px onmouseover=\"mmenuitem_over("+x+","+i+ 
                             ");\" onmouseout=mmenuitem_out() onmousedown=mmenuitem_down() onmouseup="; 
                 stringx += "mmenuitem_up();mexec("+x+","+i+"); "; 
                 if(thismenuitem.pos=="0"){ 
                                     stringx += ">"+ifspace+thismenuitem.caption+"</td></tr>";     
                                   }else if(thismenuitem.pos=="1"){ 
                                     stringx += ">"+thismenuitem.caption+ifspace+"</td></tr>";     
                                   }else if(thismenuitem.pos=="2"){ 
                                     stringx += "background='"+thismenuitem.img+"'>"+thismenuitem.caption+"</td></tr>";     
                                   }else{ 
                                     stringx += ">"+thismenuitem.caption+"</td></tr>"; 
                                   } 
                 }else{ 
                             stringx+='<tr><td height="1" background="hr.gif" onmousemove="clearTimeout(mpopTimer);"></td></tr>\n'; 
                             } 
                         }stringx+='</table>\n</div>' 
                         } 
                          
                } 
                 
                     document.write("<div align='left'>"+stringx+"</div>"); 
} 
function mcheckLocation(){ 
if(isNaN(mmenuwidth))mmenuwidth=document.body.clientWidth*parseInt(mmenuwidth.substring(0,3))/100;ym=eval(document.body.scrollTop)+document.body.clientHeight-mmenuheight-10;xm=eval(document.body.scrollLeft)+10;y=mmenutable.style.pixelTop;x=mmenutable.style.pixelLeft;if(Math.abs(ym-y)>1)mmenutable.style.pixelTop=y+=(ym-y)/5;else mmenutable.style.pixelTop=y=ym;if(Math.abs(xm-x)>1)mmenutable.style.pixelLeft=x+=(xm-x)/5;else mmenutable.style.pixelLeft=x=xm;setTimeout("mcheckLocation()",10);}

mpmenu1=new mMenu('File','','self','','','',''); 
mpmenu1.addItem(new mMenuItem('New','javascript:alert(\\"New\\")','self',false,'New','','','','')); 
mpmenu1.addItem(new mMenuItem('Open','javascript:alert(\\"Open\\")','self',false,'Open','','','','')); 
mpmenu1.addItem(new mMenuItem('Save','javascript:alert(\\"Save\\")','self',false,'Save','','','','')); 
mpmenu1.addItem(new mMenuItem(null,null,null,true)); 
mpmenu1.addItem(new mMenuItem('Exit','javascript:alert(\\"Exit\\")','self',false,'Exit','','','','')); 
mpmenu2=new mMenu('Edit','','self','','','',''); 
mpmenu2.addItem(new mMenuItem('Undo','javascript:alert(\\"Undo\\")','self',false,'Undo','','','','')); 
mpmenu2.addItem(new mMenuItem('Forward','javascript:alert(\\"Forward\\")','self',false,'Forward','','','','')); 
mpmenu2.addItem(new mMenuItem(null,null,null,true)); 
mpmenu2.addItem(new mMenuItem('Copy','javascript:alert(\\"Copy\\")','self',false,'Copy','','','','')); 
mpmenu2.addItem(new mMenuItem('Paste','javascript:alert(\\"Paste\\")','self',false,'Paste','','','','')); 
mpmenu3=new mMenu('Favorites','','self','','','',''); 
mpmenu3.addItem(new mMenuItem('My Homepage','http://www.KnifeSoft.com','blank',false,'Visit My Homepage','','','','')); 
mpmenu3.addItem(new mMenuItem('Yahoo','http://www.yahoo.com','blank',false,'Visit Yahoo','','','','')); 
mpmenu4=new mMenu('Help','','self','','','',''); 
mpmenu4.addItem(new mMenuItem('Contect','javascript:alert(\\"Contect\\")','self',false,'Contect','','','','')); 
mpmenu4.addItem(new mMenuItem('Send me an email','mailto:support@knifesoft.com','self',false,'Send me an email.','','','','')); 
mpmenu4.addItem(new mMenuItem(null,null,null,true)); 
mpmenu4.addItem(new mMenuItem('About','javascript:alert(\\"About\\")','self',false,'About WebMenuShop','','','','')); 
mpmenu4=new mMenu('KnifeSoft','http://www.knifesoft.com','self','','','',''); 
mwritetodocument(); 
mcheckLocation(); 
</script>

<SELECT onchange="window.open(this.value,'','')"> <OPTION>产品快速导航</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=1&CateId=1 selected>多媒体产品</OPTION> <OPTION value=http://www.tcl.com/03product/tv/chanpin-hid.htm>  DLP数字光显背投</OPTION> <OPTION value=http://www.tclking.com>  LCD液晶电视</OPTION> <OPTION value=http://www.tcl.com/03product/tv/chanpin-hid.htm>  数字高清背投</OPTION> <OPTION value=http://www.tcl.com/03product/tv/chanpin-pdp.htm>  PDP等离子电视</OPTION> <OPTION value=http://www.tcl.com/03product/tv/chanpin-crt.htm>  CRT高清彩电</OPTION> <OPTION value=03product/pro2.jsp?cateID=1&CateId=61>  酒店电视</OPTION> <OPTION value=03product/pro2.jsp?cateID=1&CateId=141>  乐华彩电</OPTION> <OPTION value=http://av.tcl.com/03products/List.asp?ListID=246>  视盘机</OPTION> <OPTION value=http://www.tcl.com/03product/mon/index.html>  监视器</OPTION> <OPTION value=http://www.tcl.com/03product/vw/index.html>  电视墙</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=11&CateId=1>通讯产品</OPTION> <OPTION value=http://www.tclmobile.com.cn/mobile/product.jsp?catid=77>  手机</OPTION> <OPTION value=03product/pro2.jsp?cateID=11&CateId=18>  电话机</OPTION> <OPTION value=03product/pro2.jsp?cateID=11&CateId=19>  网络设备</OPTION> <OPTION value=03product/pro2.jsp?cateID=11&CateId=293>  宽带产品</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=12&CateId=1>数码产品</OPTION> <OPTION value=http://www.tcl-digital.com/product/family.asp>  家用电脑</OPTION> <OPTION value=http://www.tcl-digital.com/product/business.asp>  商用电脑</OPTION> <OPTION value=http://www.tcl-digital.com/product/notebook.asp>  笔记本电脑</OPTION> <OPTION value=http://www.tcl-digital.com/product/digital.asp>  DV产品</OPTION> <OPTION value=http://www.tcl-digital.com/product/digital.asp?Cateid=82>  MP3播放器</OPTION> <OPTION value=http://www.go-video.com.cn/html/productshow.asp?sortid=25&sortid2=7>  MP4播放器</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=13&CateId=1>家电产品</OPTION> <OPTION value=03product/pro2.jsp?cateID=13&CateId=25>  电冰箱</OPTION> <OPTION value=03product/pro2.jsp?cateID=13&CateId=26>  洗衣机</OPTION> <OPTION value=http://www.tclac.com/tclaccn/product/product.aspx>  空调</OPTION> <OPTION value=http://www.tclac.com/tclaccn/product/productlist6.aspx>  中央空调</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist1.aspx>  电饭煲</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist2.aspx>  电磁炉</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist3.aspx>  电风扇</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist4.aspx>  饮水机</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist5.aspx>  电暖器</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist6.aspx>  净水器</OPTION> <OPTION value=http://www.nanhaitcl.com/product/productlist7.aspx>  烧烤炉</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=14&CateId=1>电气产品</OPTION> <OPTION value=http://www.tcl-elc.com/main/gb/product/index.jsp>  开关插座</OPTION> <OPTION value=http://www.tcl-lighting.com/products.asp>  照明产品</OPTION> <OPTION value=http://www.tclelec.com/product/product_ljfl.htm>  工业电器</OPTION> <OPTION value=03product/pro2.jsp?cateID=14&CateId=161>  智能楼宇</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=15&CateId=1>部品产品</OPTION> <OPTION value=http://www.asic.com.cn/cn/product.htm>  集成电路</OPTION> <OPTION value=http://www.tclrf.com/products/index.html>  高频头</OPTION> <OPTION value=http://www.tclbattery.com/china/product01.asp>  电池</OPTION> <OPTION style="BACKGROUND: #999; COLOR: #fff" value=03product/pro2.jsp?cateID=16&CateId=1>文化产品</OPTION> <OPTION value=http://www.meikamusic.com/>  美卡音像</OPTION> <OPTION value=http://www.tcl-disc.com/tp.htm>  TCL光盘</OPTION></SELECT>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

后来发展到其文字内容可以增、删、编、改，即可以编辑：

<html>

<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>EditSelect</title> 
<script> 
function isIE(){ 
a=navigator.appVersion.split(";") 
b=a[1].split(" ") 
return parseFloat(b[2]) 
}

if (isIE()<5.5)  
{ 
     scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><div id="selecthtml" class="selectcontent">selectáD表</div></div>' 
} 
else 
{ 
     scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><iframe id=selframe frameborder=0 height=100%></iframe><div id="selecthtml" class="selectcontent">selectáD表</div></div>' 
}

document.write(scHTML) 
vDiv=selectcontent 
vDivHtml=selecthtml

var redge=document.body.clientWidth-vleft 
   var bedge=document.body.clientHeight-vtop

if (!combo.width) {vDiv.style.width=pTable.offsetWidth} else {vDiv.style.width=combo.width}

if (combo.height==0) 
      { 
        vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 
        vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 
      } 
      else 
      { 
         if (htmltable.offsetHeight>combo.height) 
          { 
            vDiv.style.pixelHeight=combo.height 
            vDivHtml.style.pixelHeight=combo.height

}  
           else  
           { 
           
              vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 
              vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 
           } 
    
       } 
     
    vDivHtml.scrollTop=0 
     
    if (redge<vDiv.offsetWidth) 
      vDiv.style.left=vleft-1-(vDiv.offsetWidth-redge) 
        else 
      vDiv.style.left=vleft-1

if (bedge<vDiv.offsetHeight) 
    //vDiv.style.top=vtop-vDiv.offsetHeight-pDiv.offsetHeight 
    vDiv.style.top=vtop-vDiv.offsetHeight+bedge 
         else 
      vDiv.style.top=vtop 
       
     
    vDivHtml.style.width=parseInt(vDiv.style.width) 
      vDiv.style.visibility="visible" 
  } 
   
  this.add=function(text,js){ 
     combo.options[combo.options.length]=text 
     combo.oj[combo.oj.length]=js

} 
   
  this.clearall=function(){ 
  combo.options=new Array() 
  }

this.about=function(){ 
   
 } 
}

function mo(obj){ 
obj.style.backgroundColor="#000099" 
obj.style.color="#ffffff" 
}

function mu(obj){ 
obj.style.backgroundColor="" 
obj.style.color="#000000" 
}

document.onmousedown=function(){ 
if (vDiv.style.visibility=="visible"){ 
mx=event.x + document.body.scrollLeft 
my=event.y + document.body.scrollTop;

x1=vDiv.offsetLeft 
y1=vDiv.offsetTop

x2=vDiv.offsetLeft+vDiv.offsetWidth 
y2=vDiv.offsetTop+vDiv.offsetHeight

if (mx<x1 || my<y1 || x2<mx || y2<my)  
   {  
     vDiv.style.visibility='hidden' 
   } 
} 
}</script>

.selectdiv 
{ 
position: absolute;  
width:100; 
overflow:hidden; 
} 
.select{ 
border-collapse: collapse; 
border:1px solid #7F9DB9 
} 
</style> 
</head>

<table border="0" width="100%"> 
 <tr> 
  <td width="151" align="center"><font size="2">可编辑的Select</font></td> 
  <td><script> 
var sel1=new editselect("select1","25","可编辑的Select",""); 
sel1.add("这是一个可以编辑的Select") 
sel1.add("支持CSS") 
sel1.add("可以通过CSS，修改外形") 
sel1.add("突破原来的Select诸多限制") 
</script></td> 
 </tr> 
 <tr> 
  <td width="151" align="center"><font size="2">长度可以随意修改 
可以设置为只读</font></td> 
  <td> 
  <script> 
var sel2=new editselect("select2","20","长度可以随意修改",250,82,1); 
sel2.add("这是一个可以编辑的Select") 
sel2.add("支持CSS") 
sel2.add("可以通过CSS，修改外形")

sel2.add("作者:舜子制作") 
sel2.add("MSN:puterjam@msn.com") 
</script> 
  </td> 
 </tr> 
 <tr> 
  <td width="151" align="center"><font size="2">可以遮盖系统Select</font></td> 
  <td> 
  <script> 
var sel3=new editselect("select3","25","可以遮盖系统Select","",41); 
sel3.add("这是一个可以编辑的Select") 
sel3.add("支持CSS") 
sel3.add("可以通过CSS，修改外形") 
sel3.add("突破原来的Select诸多限制") 
</script> 
  </td> 
 </tr> 
 <tr> 
  <td width="151" align="right">　</td> 
  <td><select><option>系统的Select</option></select>　</td> 
 </tr> 
</table> 
</body>

</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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select发展史 超强

select发展史超强