点击出现图片大图效果

<style>
#demo{overflow:hidden;width:120px;text-align:center;padding:10px;}
#demo img{border:none;width:100px;height:100px;}
#enlarge_images{position:absolute;display:none;z-index:2;}
</style>
<div id="demo">
<img src="http://bbs.blueidea.com/attachments/2007/6/13/20070613_c4973b5442984904d1ddU5ChXTh3HECI.jpg" />
<img src="http://bbs.blueidea.com/attachments/2007/6/13/20070613_c4973b5442984904d1ddU5ChXTh3HECI.jpg" />
<img src="http://bbs.blueidea.com/attachments/2007/6/13/20070613_c4973b5442984904d1ddU5ChXTh3HECI.jpg" />
</div>
<div id="enlarge_images"></div>
<script>
var demo = document.getElementById("demo");
var gg = demo.getElementsByTagName("img");
var ei = document.getElementById("enlarge_images");
for(i=0; i<gg.length; i++){
var ts = gg[i];
ts.onclick = function(event){
   event = event || window.event;
   ei.style.display = "block";
   ei.innerHTML = '<img src="' + this.src + '" />';
   ei.style.top = document.body.scrollTop + event.clientY + 10 + "px";
   ei.style.left = document.body.scrollLeft + event.clientX + 10 + "px";
}
ts.onmouseout = function(){
   ei.innerHTML = "";
   ei.style.display = "none";
}
}
</script>