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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>javascript判斷輸入漢字字元小技巧</title>
<script>
function strlen() { //在IE8 相容模式下 不會報錯
var s = 0;
var str=document.getElementById("txt1").value;
for(var i = 0; i < str.length; i++) {
if(str.charAt(i).match(/[/u0391-/uFFE5]/)) {
s += 2;
} else {
s++;
}
}
alert(s);
}
</script>
</head>
<body>
<input type="text" value="" id="txt1"/>
<input type="button" value="確認" onclick="strlen()" />
</body>
</html>
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