图片自适应大小
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
var flag=false;
function DrawImage(ImgD,imageWidth,imageHeight) {
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= imageWidth/imageHeight){
if(image.width>imageWidth){
ImgD.width=imageWidth;
ImgD.height=(image.height*imageWidth)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
else{
if(image.height>imageHeight){
ImgD.height=imageHeight;
ImgD.width=(image.width*imageHeight)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
}
}
</script>
<title>Anddecor</title>
</head>
<body>
<img alt="" src="pic01.gif" onload= "javascript:DrawImage(this,150,130)" />/*定义图片宽不超过150，高不超过130*/
</body>
</html>
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