Why is my CalendarExtender getting overlapped when rendered?

Question

I\'m working on a .NET web application and I\'m using a CalendarExtender control within it to have the user specify a date. For some reason, when I click the icon to display the

Answer 1

I had a similar issue which I fixed with z index on fieldsets

If you have

 some content... including ajax popup 
 some more content 

then the ajax popup pops up underneath the second fieldset, to fix set the z-index on the first fieldset to be higher than the one on the second, ie as below.

 some content... including ajax popup 
 some more content