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複製代碼 代碼如下:
<html>
<head>
<title>JS限制Textarea文本域字元個數</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<SCRIPT LANGUAGE="JavaScript">
<!--//
function textCounter(field, countfield, maxlimit) {
// 函數，3個參數，表單名字，表單域元素名，限制字元；
if (field.value.length > maxlimit)
//如果元素區字元數大於最大字元數，按照最大字元數截斷；
field.value = field.value.substring(0, maxlimit);
else
//在記數區文字框內顯示剩餘的字元數；
countfield.value = maxlimit - field.value.length;
}
//-->
</SCRIPT>
</head>
<body>
<form name=myform action="">
<textarea name="message" cols="28" rows="5" onKeyDown="textCounter(message,remLen,6);" onKeyUp="textCounter(message,remLen,6);"></textarea>
您還可以輸入:<input name="remLen" type="text" value="6" size="5" readonly="readonly">個字元
</form>
</body>
</html>
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