Fit HTML content according to screen resolution

[eluser]Beginers[/eluser]
Hi All,

how do i make my page adjust its content according to the user's screen resolution. I had created a website on my pc it's pretty good looking but when i visit it in another pc the screen resolution is too much height compared to my computer screen resolution. How i do make my site resize its content according to current user's screen resolution? Please help. do i need to use css ? or javascript? or jquery? (sorry for bad english)