Client ID change in run time with diffrent framwork version in Asp .Net
when we convert web-application to version 2.0 to 4.0 at that time we need to change the line in web.config file like
<compilation debug=”true” targetFramework=”4.0″>
Because if our application with version 4.0 in IIS and your web.config file value is <compilation debug=”true” targetFramework=”2.0″>
Then client Id gives different in run time in asp.net and getting problem in java script functions.
For example I have used <asp:RadioButton id=”rbndisplay” runat=”server”></asp:RadioButton>
then if you haven’t changes the line <compilation debug=”true” targetFramework=”2.0″> in web.config file and your version 4.0 in IIS then you will get problem on java script line and through the error like null value.