mobile web application and browser size settings..

Hi all,

          Here i have developed a mobile web page by using mobile web form and i used only two label controls and displaying text.

when i browse this page its looking fine and when i browse the same page using Opera mobile browser i am getting horizontal scroll.

i want to set the mobile web form page size as Opera browser size, so that the entire page fits in the screen and no need of horizontal screen.

Please guide me on this...

And also i want to know what are most using browsers in the mobiles, because i need to work the same User interface for all browsers..

thank you...