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Home/ Questions/Q 643957
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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T21:20:21+00:00 2026-05-13T21:20:21+00:00

I have problem while using jquery maskedinput with asp.net textbox. I have a check

  • 0

I have problem while using jquery maskedinput with asp.net textbox.
I have a check box that when I check will set a mask to the textbox and when uncheck it change the mask. the problem that when the focus is lost before the mask completed to be filled the text box will empty.

how can I fix the problem???

here is my code:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>



    <script src="js/jquery-1.4.1.js" type="text/javascript"></script>


    <script src="js/jquery.maskedinput-1.2.2.js" type="text/javascript"></script>
    <script type="text/javascript">


         function mycheck() {

            if ($('#<%=chk.ClientID %>').is(':checked')) 

                {
                        $("#<%=txt.ClientID %>").unmask();
                        $("#<%=txt.ClientID %>").val("");
                        $("#<%=txt.ClientID %>").mask("999999999999");

                    } 
                    else
                     {
                        $("#<%=txt.ClientID %>").unmask();
                        $("#<%=txt.ClientID %>").val("");
                        $("#<%=txt.ClientID %>").mask("(999)999-9999");

                    }






        }
    </script>

    <style type="text/css">
        #form1
        {
            margin-top: 0px;
        }
    </style>

</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>

        <p>
            <asp:CheckBox ID="chk" runat="server" CssClass="kk" 
                onclick="mycheck()"  />
        </p>

         <p>
           <asp:TextBox ID="txt" runat="server" CssClass="tt"  ></asp:TextBox>

        </p>


        </div>
    </form>
</body>
</html>
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  1. Editorial Team
    Editorial Team
    2026-05-13T21:20:21+00:00Added an answer on May 13, 2026 at 9:20 pm

    there is a problem with plugin itself and I reported that.

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