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Modal Popup Extender: Jscript Runtime Error

Posted By:      Posted Date: September 10, 2010    Points: 0   Category :ASP.Net
I have a master detail aspx page with modal popup. The modal popup has a formview with edit and insert options. Whenever I try to show or hide the popup it always gives the following error. If I ignore it just works fine. Any reason why is this error popping up. Once when I deleted all the breakpoints and debugged it, the error did not show up Error:       Microsoft JScript runtime error: SysArgumentNullException: Value cannot be null       Parameter name:elements. I do not where the error occurs. It shows a break some where as follows: Debug Script Section --------------------------- Sys.UI.DomEvent.prototype = {     preventDefault: Sys$UI$DomEvent$preventDefault,     stopPropagation: Sys$UI$DomEvent$stopPropagation } Sys.UI.DomEvent.registerClass('Sys.UI.DomEvent');     $addHandler = Sys.UI.DomEvent.addHandler = function Sys$UI$DomEvent$addHandler(elements, eventName, handler, autoRemove) {     /// <summary locid="M:J#Sys.UI.DomEvent.addHandler" />     /// <param></param>     /// <param></param>     /// <param></param>     /// <param optional="true" mayBeNull

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