Include Javascript inside Update Panel Not working?

I want to include javascript from remote source inside update panel,This code is to include facebook and twitter share buttons in my appli开发者_StackOverflow中文版cation.here is the code:

This works fine when the page is loaded first time, but when the page is postback with ajax, the script doesnot work, can anybody help. thanks in advance

Why are you trying to include code into an update panel? I think updating javascript works well with UpdatePanels in case you use the regular script manager. http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanager.aspx