LimitInput 字符限制代码示例
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下一篇 2012-11-27 20:29:58
/ 个人分类：课外学习
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<title>设置文本字符输入</title>
<script. language="javascript" type="text/javascript">
function checkInput(_this) {
var maxLength = 10; //最大输入字符数
var currentNum = _this.value.length; //当前输入的字符数
if (currentNum > maxLength) {
_this.value = _this.value.substring(0, maxLength);
return false;
}
document.getElementById("currentNum").innerHTML = currentNum;
}
</script>
</head>
<body>
<div>
<h2>限制字符输入实例</h2>
<textarea id="TextArea1" cols="20" rows="2" nkeyup="checkInput(this);"></textarea>
<span>
<label id="currentNum" style="color:Red;">0</label>/<label id="totalNum">10</label>
</span>
</div>
</body>
</html>
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