if(screen.width<=800) {
resind='800';
wid=609;
high1=108;
high2=293;} 
else {
   if(screen.width<=1024) {
   resind='1024'; 
   wid=790;
   high1=140;
   high2=380;} 
 else {
   resind='1280'; 
   wid=790;
   high1=140;
   high2=380;} 

}

document.writeln('<LINK href="mstyles'+resind+'.css" rel="stylesheet">');