different table widths for different browsers?

Hi,

I have a problem whereas i have a web page where i have a table of width = "750"
which in my browser is the correct width to take up the whole screen. I have noticed however that on some other computers the page only takes up 3/4 of the screen!! All browsers were Internet Explorer (though probably different versions!) but i would like to know if there is a way to resolve this problem so that my table takes up the full width of the screen no matter which browser it is being viewed in!

ps it would be great great if there is another way rather then specifying the width as 100% (as this
complicates the page i am trying to fix!!)

Cheers
Iain