javascript:_doPostBack

im getting this javascript error while using a datagrid in asp.net and c#
can any1 help?
javascript:_doPostBack(‘simple$_ctl125$_ctl0′,”)

ok if i double click on this in the left hand corner of the screen
i get an (warning)alert box with this message

“Problem with this webpage might prevent it from being displayed properly. In the future you can display the message by double clicking the warning icon displayed in the status bar.”

when i click on the show details button i get this info

Line:30
Char:3

Error?bject doesn’t support this property or method

Code:0

Thanks in advance for who ever can help coz im really really stuck

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