Question

64

Javascript validation for empty textbox on button click in asp.net

rated 0 times [ 66] [ 2] / answers: 1 / hits: 90070 / 11 Years ago, tue, october 8, 2013, 12:00:00

I have asp.net application with one panel.
Inside that panel i have one image button and textbox.
I have written a javascript validation function for textbox which will display alert box for entering some values in textbox.
Now this function is not working gave run-time error:

Object required

My code is here:

<asp:Panel ID=pnlTop runat=server>

   <tr height=35px valign=top>

      <td align=right valign=middle colspan=2 height=50>

         <asp:ImageButton ID=imgbtnGOTO runat=server ToolTip=View Specific Record BorderWidth=0

                                ImageAlign=AbsMiddle OnClientClick=javascript:return fnCheck()></asp:ImageButton>&nbsp;&nbsp;

         <asp:TextBox ID=txtPagingGoto CssClass=clsTableCellLeft Width=215px runat=server CausesValidation=true></asp:TextBox>

      </td>

   </tr>

</asp:Panel>

My Javascript function is:

function fnCheck() {

    if ((document.getElementById(txtPagingGoto).value).length == 0) {

        alert(The textbox should not be empty);

    }

}

Please suggest solution for this.

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kevonmoisesf

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answered 11 Years ago jalyn · Accepted Answer

function fncheck()

{

        var pgng = document.getElementById(<%=txtPagingGoto.ClientID%>).value.trim();

        if(pgnd == )

        {

            alert('The textbox should not be empty...');

            document.getElementById(<%=txtfname.ClientID%>).focus();

            return false;

        }

}