MaintainScrollPositionOnPostback

Question

hai all,

        i have a application in which i used normal calendar,when it is used it is going down,for that i kept maintainscrollbackonpostback="true", but whenever i submitting form without entering the data
it is not going to the error field ,when i remove the maintainscrollbackonpostback="true" it is working  but iam getting the same problem for calendar,

can anyone help,
thanks