validation summary control

I'm using visual studio 2008.
On my web form I use a validation summary and put it to the top of the page right below the title.
When the form is loaded I can see there is a big space between the title and the form below, I think becasue the validation summery control reserved that space.
If there are some validation errors after clicking submit, the validation will show between the title and the form below. But If not, there is a too much big space there.
I hope it can autoshrink and auto extend. But I cannot find a property there. How can I eliminate the white space that validation summary control reserved if there is no error and if the first time load of the page?
Thanks

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