<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv=content-type>
<meta name=author content="Laruence(www.laruence.com)">
<title>即时显示上传缩略图</title>
</head>
<body style="text-align:center;">
<div>
<img src="D:\20140606193440.jpg" onload="DrawImage(this,250,150);" >
</div>
<script language="javascript">
var flag=false;
function DrawImage(ImgD,w,h){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= w/h){
if(image.width>w){
ImgD.width=w;
ImgD.height=(image.height*w)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
//ImgD.alt=image.width+"×"+image.height;
}
else{
if(image.height>h){
ImgD.height=h;
ImgD.width=(image.width*h)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
//ImgD.alt=image.width+"×"+image.height;
}
}
}
</script>
</body>
</html>
JS控制生成缩略图
最新推荐文章于 2024-06-11 17:10:29 发布