JS实现划词标记+划词搜索功能


采用JAVASCRIPT方法为鼠标划选的文字加上着重样式,同时还有搜索功能。完整示例代码如下:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>Untitled Document</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

</head>

<body>

<SCRIPT language=javascript>

<!--

document.body.onload=adddiv;

document.onmousedown=recordobj;

document.ondblclick=dbclick;

document.onmouseup=showselect;

var starobj,isdb=false,allow=true;

function isallow()

{

if(allow){

allow=false;

alert('is closed');

}

else{

allow=true;

alert('is opend');

}

}

function dbclick()

{

isdb=true;

}

function recordobj()

{

starobj=event.srcElement;

}

function showselect() {

var str="";

if(event.srcElement.tagName!="A"&&event.srcElement.tagName!=

"INPUT"&&event.srcElement==starobj&&!isdb&&allow)

{

var oText=document.selection.createRange();

if(oText.text.length>0)

{

str=oText.text;

oText.text="BuB"+oText.text+"EuE";

}

oText.select();

event.srcElement.innerHTML=event.srcElement.innerHTML.replace("BuB",

"<u style='FONT-WEIGHT: bold;COLOR: #ff3366'>").replace("EuE","</u>");

}

searchgoogle(str)

isdb=false;

}

function searchgoogle(str)

{

var obj=document.getElementById("searchgoogle");

if(str.length>0)

{

obj.style.display="block";

obj.style.position="absolute";

obj.style.zindex=999;

obj.style.posTop=document.body.scrollTop+event.y-25;

obj.style.posLeft=document.body.scrollLeft+event.x+5;

obj.style.widht=80;

obj.innerHTML="<a target=_blank

href=http://www.google.com/search?ie=UTF-8&oe=UTF-8&q="+str+"

style='BORDER-RIGHT: royalblue thin solid; BORDER-TOP: royalblue thin solid;

FONT-WEIGHT: bold; BORDER-LEFT: royalblue thin solid; CLIP: rect(auto auto auto auto);

COLOR: #ffffff; BORDER-BOTTOM: royalblue thin solid; BACKGROUND-COLOR: inactivecaption;

TEXT-DECORATION: none'>Search It!</a>";

}

else

{

obj.style.display="none";

}

}

function adddiv()

{

var mobj = document.createElement("div");

mobj.id="searchgoogle";

document.body.appendChild(mobj);

}

//-->

</SCRIPT>

<INPUT type="button" onclick="isallow()" value="关闭/打开划词功能">

<p>qrasfdasfasfdasfsafasdfsafsafasdfasdfasd</p>

</body>

</html>

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