js 經過小圖時彈出大圖

page：

    <script language="javascript" type="text/javascript">

 function showLarge(img){//onmouseover         img.onmouseover=function(event){                  event = window.event;                         var ei = document.getElementById("enlarge_images");                         ei.style.display = "block";                   ei.innerHTML = '<img src="' + img.src + '" />';                   ei.style.top  = document.body.scrollTop + "px";                   ei.style.left = document.body.scrollLeft + 20 + "px";                   ei.style.width=150+"px";                  }         }         function quit(){//onmouseout                         var ei = document.getElementById("enlarge_images");                   ei.innerHTML = "";                   ei.style.display = "none";                  }

</script>

     <style>     #enlarge_images{position:absolute;display:none;z-index:2;}     </style>

<img src='<%=ul2%>'  onmouseover="showLarge(this)"  onmouseout="quit()" style = "width:50px ; height:50px " />

<div id="enlarge_images"></div>