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input上传图片预览
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>uploadPreview演示</title>
<script src="uploadPreview.js" type="text/javascript"></script>
<script>
window.onload = function () {
new uploadPreview({ UpBtn: "up_img", DivShow: "imgdiv", ImgShow: "imgShow" });
}
</script>
</head>
<body>
<div id="imgdiv"><img id="imgShow" width="100" height="100" /></div>
<input type="file" id="up_img" />
</body>
</html>
