<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
function previewPic(){
img=document.getElementById("f");
if(img){
imgext=img.value.substring(img.value.indexOf('.'),img.value.length);
imgext=imgext.toLowerCase();
if(imgext!='.bmp'&&imgext!='.jpg'&&imgext!='.jpeg'&&imgext!='gif'){
img.value='';
alert('格式不對！');
return false;
}
document.getElementById("previewImg").innerHTML="<img src='"+img.value+"' width=120 />";
}
}
</script>
<input type="file" name="f" id="f" onchange="previewPic()" />
<div id="previewImg"></div>
</body>
</html>
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