使用iframe作为日历的载体，不再被select和flash等控件挡住的日期输入框

<html> 
<head> 
<script language="javascript"> 
<!-- 
//more javascript from http://www.smallrain.net

//==================================================== 参数设定部分 ======================================================= 
var bMoveable=true;        //设置日历是否可以拖动 
var _VersionInfo="Version:2.0"    //版本信息

//==================================================== WEB 页面显示部分 ===================================================== 
var strFrame;        //存放日历层的HTML代码 
document.writeln('<iframe bgcolor="#000000" id=meizzDateLayer Author=wayx frameborder=0 style="position: absolute;  width: 186; height: 247; z-index: 9998; display: none"></iframe>'); 
strFrame='<style>'; 
strFrame+='INPUT.button{BORDER-RIGHT: #B3C9E1 1px solid;BORDER-TOP: #B3C9E1 1px solid;BORDER-LEFT: #B3C9E1 1px solid;'; 
strFrame+='BORDER-BOTTOM: #ff9900 1px solid;BACKGROUND-COLOR: #EDF2F8;font-family:宋体;}'; 
strFrame+='TD{FONT-SIZE: 9pt;font-family:宋体;}'; 
strFrame+='</style>'; 
strFrame+='<scr' + 'ipt>'; 
strFrame+='var datelayerx,datelayery;    /*存放日历控件的鼠标位置*/'; 
strFrame+='var bDrag;    /*标记是否开始拖动*/'; 
strFrame+='function document.onmousemove()    /*在鼠标移动事件中，如果开始拖动日历，则移动日历*/'; 
strFrame+='{if(bDrag && window.event.button==1)'; 
strFrame+='    {var DateLayer=parent.document.all.meizzDateLayer.style;'; 
strFrame+='        DateLayer.posLeft += window.event.clientX-datelayerx;/*由于每次移动以后鼠标位置都恢复为初始的位置，因此写法与div中不同*/'; 
strFrame+='        DateLayer.posTop += window.event.clientY-datelayery;}}'; 
strFrame+='function DragStart()        /*开始日历拖动*/'; 
strFrame+='{var DateLayer=parent.document.all.meizzDateLayer.style;'; 
strFrame+='    datelayerx=window.event.clientX;'; 
strFrame+='    datelayery=window.event.clientY;'; 
strFrame+='    bDrag=true;}'; 
strFrame+='function DragEnd(){        /*结束日历拖动*/'; 
strFrame+='    bDrag=false;}'; 
strFrame+='</scr' + 'ipt>'; 
strFrame+='<div style="z-index:9999;position: absolute; left:0; top:0;" onselectstart="return false"><span id=tmpSelectYearLayer Author=wayx style="z-index: 9999;position: absolute;top: 3; left: 19;display: none"></span>'; 
strFrame+='<span id=tmpSelectMonthLayer Author=wayx style="z-index: 9999;position: absolute;top: 3; left: 78;display: none"></span>'; 
strFrame+='<table style="FILTER:dropshadow(color=#EDEDF8,offx=3.3,offy=3.3,positive=1);" cellSpacing="0" cellPadding="0" width="100%" border="0"><tr><td>'; 
// 控件边框颜色 
strFrame+='<table border=1 cellspacing=0 cellpadding=0 width=182 height=160 bgColor="#FFFFFF" borderColorLight=#7197CA borderColorDark="#ffffff"  Author="wayx">'; 
strFrame+='  <tr Author="wayx"><td width=182 height=23 Author="wayx" bgcolor=#FFFFFF><table border=0 cellspacing=1 cellpadding=0 width=180 Author="wayx" height=23>'; 
strFrame+='      <tr align=center Author="wayx"><td width=16 align=center bgcolor=#B6CAE4 style="font-size:12px;cursor: hand;color: #ffffff" '; 
strFrame+='        onclick="parent.meizzPrevM()" title="向前翻 1 月" Author=meizz><b Author=meizz><</b>'; 
strFrame+='        </td><td width=60 align=center style="font-size:12px;cursor:default" Author=meizz '; 
strFrame+='onmouseover="style.backgroundColor=\'#D7E1F0\'" onmouseout="style.backgroundColor=\'white\'" '; 
strFrame+='onclick="parent.tmpSelectYearInnerHTML(this.innerText.substring(0,4))" title="点击这里选择年份"><span Author=meizz id=meizzYearHead></span></td>'; 
strFrame+='<td width=48 align=center style="font-size:12px;cursor:default" Author=meizz onmouseover="style.backgroundColor=\'#D7E1F0\'" '; 
strFrame+=' onmouseout="style.backgroundColor=\'white\'" onclick="parent.tmpSelectMonthInnerHTML(this.innerText.length==3?this.innerText.substring(0,1):this.innerText.substring(0,2))"'; 
strFrame+='        title="点击这里选择月份"><span id=meizzMonthHead Author=meizz></span></td>'; 
strFrame+='        <td width=16 bgcolor=#B6CAE4 align=center style="font-size:12px;cursor: hand;color: #ffffff" '; 
strFrame+='         onclick="parent.meizzNextM()" title="向后翻 1 月" Author=meizz><b Author=meizz>></b></td></tr>'; 
strFrame+='    </table></td></tr>'; 
strFrame+='  <tr Author="wayx"><td width=180 height=18 Author="wayx">'; 
strFrame+='<table border=1 cellspacing=0 cellpadding=0 bgcolor=#618BC5 ' + (bMoveable? 'onmousedown="DragStart()" onmouseup="DragEnd()"':''); 
strFrame+=' BORDERCOLORLIGHT=#3677b1 bgcolor=#5168C8 BORDERCOLORDARK=#FFFFFF width="100%" height=25 Author="wayx" style="cursor:' + (bMoveable ? 'move':'default') + '">'; 
strFrame+='<tr Author="wayx" valign="middle" align="center"><td style="font-size:12px;color:#FFFFFF" Author=meizz><b>日</b></td>'; 
strFrame+='<td style="font-size:12px;color:#FFFFFF"  Author=meizz><b>一</b></td><td style="font-size:12px;color:#FFFFFF" Author=meizz><b>二</b></td>'; 
strFrame+='<td style="font-size:12px;color:#FFFFFF" Author=meizz><b>三</b></td><td style="font-size:12px;color:#FFFFFF" Author=meizz><b>四</b></td>'; 
strFrame+='<td style="font-size:12px;color:#FFFFFF"   Author=meizz><b>五</b></td><td style="font-size:12px;color:#FFFFFF" Author=meizz><b>六</b></td></tr>'; 
strFrame+='</table></td></tr>'; 
strFrame+='  <tr Author="wayx"><td width="100%" height=120 Author="wayx">'; 
strFrame+='    <table border=1 cellspacing=2 cellpadding=0 borderColorDark=#ffffff bgColor=#FFFFFF borderColorLight=#83A4D1 width="100%" height=120 Author="wayx">'; 
var n=0; for (j=0;j<5;j++){ strFrame+= ' <tr align=center Author="wayx">'; for (i=0;i<7;i++){ 
strFrame+='<td width=25 height=25 id=meizzDay'+n+' style="font-size:12px" Author=meizz onclick=parent.meizzDayClick(this.innerText,0)></td>';n++;} 
strFrame+='</tr>';} 
strFrame+='      <tr align=center Author="wayx">'; 
for (i=35;i<39;i++)strFrame+='<td width=25 height=25 id=meizzDay'+i+' style="font-size:12px" Author=wayx onclick="parent.meizzDayClick(this.innerText,0)"></td>'; 
strFrame+='        <td colspan=3 align=right Author=meizz><span onclick=parent.closeLayer() style="font-size:12px;cursor: hand"'; 
strFrame+='         Author=meizz title="' + _VersionInfo + '"><u>关闭</u></span> </td></tr>'; 
strFrame+='    </table></td></tr><tr Author="wayx"><td Author="wayx">'; 
strFrame+='        <table border=0 cellspacing=1 cellpadding=0 width=100% Author="wayx" bgcolor=#FFFFFF>'; 
strFrame+='          <tr Author="wayx"><td Author=meizz align=left><input Author=meizz type=button class=button style="cursor:hand" value="<<" title="向前翻 1 年" onclick="parent.meizzPrevY()" '; 
strFrame+='             onfocus="this.blur()" style="font-size: 12px; height: 20px"><input Author=meizz class=button title="向前翻 1 月" type=button '; 
strFrame+='             value="< " style="cursor:hand" onclick="parent.meizzPrevM()" onfocus="this.blur()" style="font-size: 12px; height: 20px"></td><td '; 
strFrame+='             Author=meizz align=center><input Author=meizz style="cursor:hand"  type=button class=button value=Today onclick="parent.meizzToday()" '; 
strFrame+='             onfocus="this.blur()" title="当前日期" style="font-size: 12px; height: 20px; cursor:hand"></td><td '; 
strFrame+='             Author=meizz align=right><input Author=meizz type=button class=button value=" >" style="cursor:hand" onclick="parent.meizzNextM()" '; 
strFrame+='             onfocus="this.blur()" title="向后翻 1 月" class=button style="font-size: 12px; height: 20px"><input '; 
strFrame+='             Author=meizz type=button class=button style="cursor:hand" value=">>" title="向后翻 1 年" onclick="parent.meizzNextY()"'; 
strFrame+='             onfocus="this.blur()" style="font-size: 12px; height: 20px"></td>'; 
strFrame+='</tr></table></td></tr></table></td></tr></table></div>';

window.frames.meizzDateLayer.document.writeln(strFrame); 
window.frames.meizzDateLayer.document.close();        //解决ie进度条不结束的问题

//==================================================== WEB 页面显示部分 ====================================================== 
var outObject; 
var outButton;        //点击的按钮 
var outDate="";        //存放对象的日期 
var odatelayer=window.frames.meizzDateLayer.document.all;        //存放日历对象 
function setday(tt,obj) //主调函数 
{ 
    if (arguments.length >  2){alert("对不起！传入本控件的参数太多！");return;} 
    if (arguments.length == 0){alert("对不起！您没有传回本控件任何参数！");return;} 
    var dads  = document.all.meizzDateLayer.style; 
    var th = tt; 
    var ttop  = tt.offsetTop;     //TT控件的定位点高 
    var thei  = tt.clientHeight;  //TT控件本身的高 
    var tleft = tt.offsetLeft;    //TT控件的定位点宽 
    var ttyp  = tt.type;          //TT控件的类型 
    while (tt = tt.offsetParent){ttop+=tt.offsetTop; tleft+=tt.offsetLeft;} 
    dads.top  = (ttyp=="image")? ttop+thei : ttop+thei+6; 
    dads.left = tleft; 
    outObject = (arguments.length == 1) ? th : obj; 
    outButton = (arguments.length == 1) ? null : th;    //设定外部点击的按钮 
    //根据当前输入框的日期显示日历的年月 
    var reg = /^(\d+)-(\d{1,2})-(\d{1,2})$/;  
    var r = outObject.value.match(reg);  
    if(r!=null){ 
        r[2]=r[2]-1;  
        var d= new Date(r[1], r[2],r[3]);  
        if(d.getFullYear()==r[1] && d.getMonth()==r[2] && d.getDate()==r[3]){ 
            outDate=d;        //保存外部传入的日期 
        } 
        else outDate=""; 
            meizzSetDay(r[1],r[2]+1); 
    } 
    else{ 
        outDate=""; 
        meizzSetDay(new Date().getFullYear(), new Date().getMonth() + 1); 
    } 
    dads.display = '';

event.returnValue=false; 
}

var MonHead = new Array(12);               //定义阳历中每个月的最大天数 
    MonHead[0] = 31; MonHead[1] = 28; MonHead[2] = 31; MonHead[3] = 30; MonHead[4]  = 31; MonHead[5]  = 30; 
    MonHead[6] = 31; MonHead[7] = 31; MonHead[8] = 30; MonHead[9] = 31; MonHead[10] = 30; MonHead[11] = 31;

var meizzTheYear=new Date().getFullYear(); //定义年的变量的初始值 
var meizzTheMonth=new Date().getMonth()+1; //定义月的变量的初始值 
var meizzWDay=new Array(39);               //定义写日期的数组

function document.onclick() //任意点击时关闭该控件    //ie6的情况可以由下面的切换焦点处理代替 
{  
with(window.event) 
{ if (srcElement.getAttribute("Author")==null && srcElement != outObject && srcElement != outButton) 
    closeLayer(); 
} 
}

function document.onkeyup()        //按Esc键关闭，切换焦点关闭 
{ 
    if (window.event.keyCode==27){ 
        if(outObject)outObject.blur(); 
        closeLayer(); 
    } 
    else if(document.activeElement) 
        if(document.activeElement.getAttribute("Author")==null && document.activeElement != outObject && document.activeElement != outButton) 
        { 
            closeLayer(); 
        } 
}

function meizzWriteHead(yy,mm)  //往 head 中写入当前的年与月 
{ 
    odatelayer.meizzYearHead.innerText  = yy + " 年"; 
    odatelayer.meizzMonthHead.innerText = mm + " 月"; 
}

function closeLayer()               //这个层的关闭 
{ 
    document.all.meizzDateLayer.style.display="none"; 
}

function IsPinYear(year)            //判断是否闰平年 
{ 
    if (0==year%4&&((year%100!=0)||(year%400==0))) return true;else return false; 
}

function GetMonthCount(year,month)  //闰年二月为29天 
{ 
    var c=MonHead[month-1];if((month==2)&&IsPinYear(year)) c++;return c; 
} 
function GetDOW(day,month,year)     //求某天的星期几 
{ 
    var dt=new Date(year,month-1,day).getDay()/7; return dt; 
}

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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