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VB script function not firing from asp:button click

I have a vbscript function on the page to open the calendar.I am trying to fire this from button click event.
I am getting this error 'getdate' is not a member of 'ASP.default_aspx'.
Function getdate
            frm1.txtdate.value = window.showModalDialog("calendar.aspx","","dialogHeight: 200px;dialogWidth: 400px;status:no;" )
      End Function

     <asp:Button id="btnDate" runat="server" alt="Calendar" onclick="getdate()" align="top" border="0" />

Before it was image  and it's firing the getdate function.Now I changed it from iamge button to regular button and it is not firing the getdate function.

Any suggestion please.
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3 Solutions
Kamal KhaleefaInformation Security SpecialistCommented:
add onclick event on your code behind like this

  Private Sub btnDate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDate.Click

'here call ur function

 End Sub
Robert SchuttSoftware EngineerCommented:
Where is "Function getdate" defined/written out? Looking at the call inside it needs to be client side. That would mean you would have to use OnClientClick instead of OnClick:
<asp:Button id="btnDate" runat="server" alt="Calendar" OnClientClick="getdate()" align="top" border="0" />

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Some more changes might be necessary to prevent the button from posting back.

* Alternatively you could use a simple HTML button instead of ASP button if you just want client side functionality:
<input id="ButtonChooseDate" type="button" value="choose date" onclick="getdate()" />

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KavyaVSAuthor Commented:
Hi robert_Schutt
I tried the OnClienClick="getdate();" but it is not working.The calenadar is not showing up.there is no error also.

The getdate function defined in the head section of aspx page.
To maintain consistency I have to use the asp button controls.I can't use HTML button controls Because few more asp buttons are there on the same row.

Any suggestions please.

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Robert SchuttSoftware EngineerCommented:
Please post the relevant part of your html, or see if you can get what you need from this working code where I converted the getdate function to javascript:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title> EE Q_28011236 </title>
    <script type="text/javascript">
        function getdate() {
            document.forms['frm1'].txtdate.value = window.showModalDialog("calendar.aspx","","dialogHeight: 200px;dialogWidth: 400px;status:no;" );
            return false;
    <form id="frm1" runat="server" clientidmode="Static">
        <asp:Button ID="Button1" runat="server" Text="Button" onclientclick="return getdate()" />
        <input name="txtdate" />

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The return false is to stop the form from being posted back, which I assumed would be needed to just show the date in the textbox and be able to continue filling in the form.
KavyaVSAuthor Commented:
Hi robert_Schutt

Thank you very much.It is working now.Even If I commented the return false; in the java script function it is working fine.

Is it vbscript preventing it from working?

I will post another question regarding how to pass parameters to java script function from OnClient Click(from the Link button in DataGrid)
If you have any suggestion please let me know.

KavyaVSAuthor Commented:
Greatly Appreciated.
Robert SchuttSoftware EngineerCommented:
Is it vbscript preventing it from working?
In IE it should be possible to make it work but without seeing the relevant part of your html I can't tell what was wrong with it. I tried to get it to work but couldn't so I posted an alternative.
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