Ajax Tabs OnClientActiveTabChanged error

I have 3 tabs .OnClientActiveTabChanged event I am calling a function which is defined in a separate javascript file.My code works when I have the script code in same file as aspx page. But it throws javascript error when i have the code in a seprate javascript file. "Null is null or not an object" var InslastName = $get(''); var InsFirstName = $get('');The InslastName and InsFirstName are always getting as null when using external script file.I tried to use the ids 'txtInslastName' and 'txtInsFirstName' in the function,but getting error.I have many attributes in my aspx page . So i cant pass ClientID as parameter to the function.Is there any way to get resolve this issue?

Hi Sarathmn,

We cannot use Control.ClientID on a separate js file. Your problem is mainly caused by the ClientID issue. When a TextBox inside a TabPanel, its ClientID looks like this TabContainer1_TabPanel2_TextBox1, so you can find out the real ClientID from the generated HTML code and modify your js functions. Here is the another way which I would prefer.

<ajaxToolkit:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="1" OnClientActiveTabChanged="tabChanged">

function tabChanged(sender, args){
tabIndex = sender.get_activeTabIndex();
switch(tabIndex)
{
case 1: myfunction('"<%=TextBox1.ClientID%>"');break;
case 2: myfunction('"<%=TextBox2.ClientID%>"');break;
break;
}
}

myfunction is a function inside the separate js file.

I hope this help.

Best regards,

Jonathan

Thanks Jonathan for your reply.

I have a doubt.

Can I assume that the client side id of the controls inside a TabPanel have "TabContainer1_TabPanel2_" pre-fixed with the actual id?

Hi Sarathmn,

Currently, yes. But if you put the Tab control inside another contol, it is hard to say.

I hope this help.

Best regards,

Jonathan