计算中文、英文、数字、空格的字符像素宽度
<html>
<head>
<META
http-equiv="content-type" content="text/html; charset=shift_jis">
<title>TEST</title>
<script
type="text/javascript">
function SC(){
document.getElementById("p1").innerHTML = document.FMlog.txt1.value;
//alert(document.FMlog.txt1.value);
alert(document.getElementById("p1").offsetWidth);
}
</script>
</head>
<body bgcolor=
"#ffffff">
<form method="post" action="" name="FMlog">
<input name="txt1" type="text" />
<input name="btn1" type="button" onclick="SC()"
value="click me"/>
<span id="p1" style="visibility:hidden"></span>
</form>
</body>
</html>
