if (screen.width<720) st="1";
else if (screen.width<910) st="2";
else if (screen.width<1080) st="3";
else st="4";

if (parent.document.layers || document.layers) nv="sn";

if (document.all) nv="s";

if (document.getElementById&&!document.all) nv="st";

document.writeln('<link rel="stylesheet" href="'+nv+''+st+'.css" type="text/css">');