Set EnableClientScript property of Validation Summary control using Javascript

Hi,

I want to set the EnableClientScript property of the validationsummary control using javascript.

My intention is to keep the validation messages in the validationsummary even after the postback.

Note: If I set the EnableClientScript=false, then the validationsummary will not cleared after the postback by another control in some other udpate panel.

Could anyone help me on this?