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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=gb2312" />
<title>无标题文档</title>
</head>
<body>
<div>test</div>
<script type="text/javascript">
function getStringWidth(s){
var span = document.createElement("span");
span.style.cssText = "font-family: Arial, font-size: 20px";
span.innerHTML = s;
document.body.appendChild(span);
var width = span.offsetWidth;
document.body.removeChild(span);
return width;
}
alert(getStringWidth("test string!"));
</script>
</body>
</html>