鼠标滑上去后图片放大浮出效果的实现

应老婆的要求，用javascript做了一个鼠标滑上去后图片放大浮出的效果，大家指正一下。

 1 <script>
 2 
 3 function GetAbsPosition(obj)
 4 {
 5       var curleft = 0, curtop = 0;
 6       do {
 7       curleft += obj.offsetLeft;
 8       curtop += obj.offsetTop;
 9       } while (obj = obj.offsetParent);
10       return [curleft,curtop];       
11 }
12 
13 function ShowFloatingImage(image, width, height)
14 {
15     var id = "trailimageid";
16     var newdiv = document.getElementById(id);
17     if(newdiv == null)
18     {
19       newdiv = document.createElement('div');
20       newdiv.setAttribute('id',id);
21       newdiv.setAttribute('onmouseout', "HideElement('"+id+"');");
22       document.body.appendChild(newdiv);
23     }
24     newdiv.innerHTML = '<img src='+image.src+ ' width='+(image.width + width) + ' height=' + (image.height + height) + ' />';
25 
26     var absPos = GetAbsPosition(image);
27     newdiv.style.position = "absolute";        
28     newdiv.style.posLeft = absPos[0] - width/2;
29     newdiv.style.posTop = absPos[1] - height/2;
30     newdiv.style.display="block";
31 }
32 
33 function HideElement(id)
34 {
35     var elem = document.getElementById(id);
36     elem.style.display="none";
37 }
38 
39 </script>
40 
41 例子：
42 <img src="../Pictures/tupian/00070724_m500.jpg"  width="300" height="300" onmouseover="ShowFloatingImage(this, 150, 150);" />