PROBLEM WITH JAVASCRIPT . javascript function are not fired.

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XML

<script type="text/javascript">
        function onchange() {
            debugger;
            var vas = document.getElementById('<%=txt1.ClientID%>').value;
            alert(vas);
            var vas1 = document.getElementById('<%=txt1.ClientID%>').value;
            if (vas.value == "") {
                alert('pla enter address');
            }

        }

</script>

XML

<table width="100%" border="0" align="center" cellpadding="0" cellspacing="0">
           <tr>
               <td>
                   name
               </td>
               <td>
                   <asp:TextBox ID="txt1" runat="server"></asp:TextBox>
                   <asp:RequiredFieldValidator runat="server" ID="address1Req" ControlToValidate="txt1"
                       Display="None" ErrorMessage="Please enter the Address1.." />
               </td>
           </tr>
           <tr>
               <td>
                   name1
               </td>
               <td>
                   <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                   <asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator1" ControlToValidate="TextBox1"
                       Display="None" ErrorMessage="Please enter the .." />
               </td>
           </tr>
           <tr>
               <td>
                   &nbsp;
               </td>
               <td>
               <asp:button id="btnSave" tabIndex="32" runat="server" CssClass="" OnClientClick = "return compare()" Text="Save"></asp:button>
                   <asp:Button ID="btn" Text="submit" runat="server" OnClientClick="return onchange();" />
               </td>
           </tr>
       </table>

Posted 4-Jul-13 19:50pm

kumar2233

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Thanks7872 · Answer 1 · 2013-07-04T20:04:00

I seems like you try to display some alert if user lefts field blank. You tried to implement it through RequiredFieldValidator but didnt get it worked.Well,no need to implement javascript function for this one. Just set InitialValue[should be blank in this case] and validation group [anything but should be same in the button and control both]to your control as well as button.After this,your validator will be invoked if you left the field as it was with initial value.

Regards.. :laugh:

Naz_Firdouse · Answer 2 · 2013-07-04T20:08:00

change the name of the method to

ASP.NET

<asp:button id="btn" text="submit" runat="server" onclientclick="return onchange1();" xmlns:asp="#unknown" />

JavaScript

<script type="text/javascript">
        function onchange1() {
            debugger;
            var vas = document.getElementById('<%=txt1.ClientID%>').value;
            alert(vas);
            var vas1 = document.getElementById('<%=txt1.ClientID%>').value;
            if (vas.value == "") {
                alert('pla enter address');
            }
 
        }
</script>

Now the event fires

Mukesh Ghosh · Answer 3 · 2013-07-04T20:18:00

Solution 3

return compare() method not yet define which raise JScript error.
Which cause the error.

Posted 4-Jul-13 20:18pm

Mukesh Ghosh

**Nirav Prabtani** · Answer 4 · 2013-07-04T20:49:00

try this...:)

JavaScript

onclientclick="javascript:return onchange();"

e.g.

C#

<asp:button id="btnSave" tabIndex="32" runat="server" CssClass="" OnClientClick = "return compare()" Text="Save"></asp:button>
                  <asp:Button ID="btn" Text="submit" runat="server" onclientclick="javascript:return onchange();" />

PROBLEM WITH JAVASCRIPT . javascript function are not fired.

4 solutions

Solution 1

Solution 2

Solution 3

Solution 4

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