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<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script type="text/javascript" >
function showSize(e){
var div = document.createElement('div');
div.id = "div124";
div.style.position = "absolute";
div.innerHTML = "width:" + e.offsetWidth + "height:" + e.offsetHeight;
document.body.appendChild(div);
}
function hide(){
var div = document.getElementById("div124");
document.body.removeChild(div);
}
</script>
</HEAD>
<BODY>
<img src='1.jpg' onmouseout="hide()" onmouseover="showSize(this)">
</BODY>
</HTML>
这是一个思路,你自己调试精确。