<head>
<title>JS限制Textarea文本域字符个数</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<SCRIPT LANGUAGE="JavaScript">
<!--//
function textCounter(field, countfield, maxlimit) {
// 函数，3个参数，表单名字，表单域元素名，限制字符；
if (field.value.length > maxlimit)
//如果元素区字符数大于最大字符数，按照最大字符数截断；
fieldfield.value = field.value.substring(0, maxlimit);
else
//在记数区文本框内显示剩余的字符数；
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>
您还可以输入:<input name="remLen" type="text" value="6" size="5" readonly="readonly">个字符
</form>
</body>
</html>