How to add error message into validation summary control in asp.net

Hi All,

I am stuck in one requirement, I have a web page which have 4 text-boxes, 2 text-boxes validate with javascript and other 2 text-boxes validate with required field validator. i have one validation summery control and i want to show all four error message into validation summery control with out creating any custom validation.

Please help.

Thanks

Pushp Singh