if(screen.width==1280)
{
document.write("<link href='screen/style_1280.css' rel='stylesheet' type='text/css' />"); // this css runs in only 1280 resulation
}
else if(screen.width==1024)
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1024.css' />"); // this css runs in only 1024 resulation
}
else if(screen.width==1152)
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1152.css' />"); // this css runs in only 1024 resulation
}
else if(screen.width==1440)
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1440.css' />"); // this css runs in only 1400 resulation
}
else if(screen.width==1680)
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1680.css' />"); // this css runs in only 1680 resulation
}
else if(screen.width==1920)
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1920.css' />"); // this css runs in only 1680 resulation
}
else
{
document.write("<link rel='stylesheet' type='text/css' href='screen/style_1024.css' />"); // this css runs in only 1024 resulation	
}