ASSERTION FAILED FAILED TO FIND PARENT ELEMENT (name of the dropdown control) I got this error after post back of modalpopupextender ajax control. I had some cascading dropdowns on the parent page which were hooked on to dropdown controls. Resolution...

I had a strange issue today. document.getElementbyId returns null, but the object was present in the view source . then I figured out that the javascript was executed on page load ,before the object was rendered. Solution: I set the defer...