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<!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" />
<title>无标题文档</title>
</head>
<script type="text/javascript">
function checkSize() {
var obj = document.getElementById("content");
var img = null;
img = document.getElementById("test");
//document.body.insertAdjacentElement("beforeend",img);
//img.style.visibility="hidden";
img.src = obj.value; alert(img.src);
var imgwidth = img.offsetWidth;
var imgheight = img.offsetHeight;
alert(imgwidth + ":" + imgheight);
}
</script>
<body>
<form>
<input type="file" id="content" name="content" onchange="checkSize()" />
<img id="test" name="test" src="" />
<input type="button" id="btn" name="btn" value="检测图标大小" onclick="checkSize();" />
</form>
</body>
</html>