// JavaScript Document

if ((screen.width == 800) && (screen.height == 600)) 
{document.write('<link rel="stylesheet" type="text/css" href="style1.css" />');
}
else if ((screen.width == 1024) && (screen.height == 768)) 
{document.write('<link rel="stylesheet" type="text/css" href="style3.css" />');
}
else if ((screen.width == 1280) && (screen.height == 800)) 
{document.write('<link rel="stylesheet" type="text/css" href="style2.css" />');
}