function SetSize(obj, width, height) 
{ 
myImage = new Image(); 
myImage.src = obj.src; 
if (myImage.width>0 && myImage.height>0) 
{ 
var rate = 1; 
if (myImage.width>width || myImage.height>height) 
{ 
if (width/myImage.width<height/myImage.height) 
{ 
rate = width/myImage.width; 
} 
else 
{ 
rate = height/myImage.height; 
} 
} 
if (window.navigator.appName == "Microsoft Internet Explorer") 
{ 
obj.style.zoom = rate; 
} 
else 
{ 
obj.width = myImage.width*rate; 
obj.height = myImage.height*rate; 
} 
} 
} 

用法： 


<img src="img/offer/41936519.jpg" border="0" style="zoom: 0.1" onload="SetSize(this, 80, 60)"/>