Hello everyone and thanks for your help in advance. I amnew tothe AJAX toolkit and am trying to implement the ModalPopupExtender. I have everything working correctly, but the popup take an inordinate amount of time to open up (4 to 5 seconds, no database calls or things that would cause delay, just displaying text.) The page works fasterin Firefox than IE 11, but slower than the page I was trying to replace that uses the hiding and displaying of panels. I have read some posts that seem to point to IE as the problem, but nothing definitive. Any help would be appreciated.