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Page slides down when data is loaded through updatepanel

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :ASP.Net


can you tell some reason why a page may slide down to some length when data is retrieved through update panel .

There are two dropdownlist , both are in a update panel, and on first dropdownlist's selection index changes second dopdownlist's value is populated.

But for the first time when data is inserted in second dropdownlist, the page gets somewhat down .But for next times on the same page when first dropdownlist's selection changes there is no any page sliding .everything is working fine , but why for the first time page gets slided down.

There are two master pages of this page.Any idea to trap the loophole ?

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