JavaScript实现网页图片等比例缩放效果

<script language="javascript" type="text/javascript"> 
<!-- 
// 说明：用 JavaScript 实现网页图片等比例缩放 
// 整理：http://www.CodeBit.cn 
function DrawImage(ImgD,FitWidth,FitHeight) 
{ 
var image=new Image(); 
image.src=ImgD.src; 
if(image.width>0 && image.height>0) 
{ 
if(image.width/image.height>= FitWidth/FitHeight) 
{ 
if(image.width>FitWidth) 
{ 
ImgD.width=FitWidth; 
ImgD.height=(image.height*FitWidth)/image.width; 
} 
else 
{ 
ImgD.width=image.width; 
ImgD.height=image.height; 
} 
} 
else 
{ 
if(image.height>FitHeight) 
{ 
ImgD.height=FitHeight; 
ImgD.width=(image.width*FitHeight)/image.height; 
} 
else 
{ 
ImgD.width=image.width; 
ImgD.height=image.height; 
} 
} 
} 
} 
//--> 
<script>

<ccid_file values="1148202890" alt="自动缩放后的效果"
onload="javascript:DrawImage(this,200,200);" / />

<ccid_file values="1148202890" alt="自动缩放后的效果"
width="200" height="200" onload="javascript:DrawImage(this,200,200);" / />