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textarea 限制输入字数

2024-07-05 01:37:54   227人阅读

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<script type="text/javascript">
        function limitChars(id, count) {
            var obj = document.getElementById(id);
            if (obj.value.length > count) {
                obj.value = http://www.mamicode.com/obj.value.substr(0, count);
            }
        }
    </script>

　　HTML代码：

  <div>
        内容：<br />
        <textarea name="contid" runat="server" rows="2" cols="20" id="txtProcIdea" onkeydown="limitChars(‘txtProcIdea‘, 10)" 
            onchange="limitChars(‘txtProcIdea‘,10)" style="height: 49px; width: 580px;"></textarea>
    </div>

 


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