How Can I read property 'get_tabs' of null in jquery?

Question

I am using ajaxtoolkit controller tab container and I want to enable or disable tabs on certain conditions.For that I have tried following both.

It throws an error as:

"Uncaught TypeError: Cannot read property 'get_tabs' of null" How I can Enable or disable tabs in jquery or javascript.

Code:

$find(ContentPlaceHolder1_TabContainer_Vendor).get_tabs()[2].set_enabled(false); 

var tab = $find('<%=TabContainer_Vendor.ClientID%>');
tab.get_tabs()[2].set_enabled(false);

Answer 1

The problem is that tab is null . Therefore it is not a Object, and so it does not have any functions or attributes.

var tab = $find('<%=TabContainer_Vendor.ClientID%>');

Is not finding the object you wanted and returned null.