<script language="javascript"> function $(strId){ return document.getElementById(strId);}window.onload=function() { var oTxt=$("AscxLogin1_T_Acc_T_RFV"); oTxt.onkeyup=function(){ oTxt.value = oTxt.value.toLowerCase(); }} </script>
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分割线内代码插到ascxLogin.ascx内 <asp:panel id="Panel1" runat="server" height="280" HorizontalAlign="Center"> 这行上面即可