带有图片预览功能的上传表单，完整的HTML代码如下所示
<html>
<head>
<meta http-equiv=Content-Type content=text/html; charset=gb2312>
<title>带有图片预览功能的上传表单CuoXIn.com</title>
<script>
function viewmypic(mypic,imgfile) {
if (imgfile.value){
mypic.src=imgfile.value;
mypic.style.display=;
mypic.border=1;
}
}
</script>
</head>
<body>
<center>
<form >
<input name=imgfile type=file id=imgfile size=40 onchange=viewmypic(showimg,this.form.imgfile); />
<br />
</form>
<img name=showimg id=showimg src= style=display:none; alt=预览图片 />
<br />
</div>
<div style=display:none>
</div>
</center>
</body>
</html>