Focus set issue with IE8 and IE9 on mouse click

hi,

i have application created in asp.net , integrated in sharepoint using features.
in app have .aspx page having 3-4 textboxes , page postback after every 10 sec using timer event.
have used updatepanel in my  app.

now issue related ie8 7 ie9 not ie10.(it works fine ie10)

after postback(panel refresh), when click on textbox control  works fine first 1 after subsequent refresh,
focus goes start of textbox,
, not able edit it's content, untill click somewhere else , text box again.

note:- app in .net 4.0.

so provide workaround/solution same?

thanks,
vivek

just add style textbox ->position->relative;

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