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技術社區[雲棲]
限製文本框輸入指定字數內容
javascript：
<mce:script language="javascript"><!-- function checkLength(which) { var maxChars = 20; if (which.value.length > maxChars) which.value = which.value.substring(0,maxChars); var curr = maxChars - which.value.length; document.getElementById("chLeft").innerHTML = curr.toString(); } // --></mce:script>
HTML：
<div> <asp:TextBox ID="txtInput" runat="server" Width="200px" Height="60px" onkeyup="checkLength(this);" TextMode="MultiLine"></asp:TextBox> <br /> <small>文字最大長度: 20. 還剩: <span >20</span>.</small> </div>
最後更新：2017-04-02 06:51:36