AutoPostBack Refreshes to Top of Page
When you have form elements that have AutoPostBack = TRUE, it usually will take the visitor back to the top of the page when executed.
To keep the page at it’s current spot add the following to the web.config:
<configuration> <system.web> <pages smartNavigation="true"> </system.web> </configuration>
This may be deprecated and a new way is available. Mainly works in IE and may cause problems when using javascript and dhtml scripts as they will not be rendered again while using smartnavigation according to another blog.
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it take the contol at bottom..