loadStyleSheet = function(file) {
	var fileref=document.createElement("link");
	fileref.setAttribute("rel", "stylesheet");
	fileref.setAttribute("type", "text/css"); 
	fileref.setAttribute("href", file + ".css");
	document.getElementsByTagName("head").item(0).appendChild(fileref);
}

var isIE = navigator.userAgent.toLowerCase().indexOf('msie') > 0;
if (screen.width < 1024) {
	if (isIE) {
		loadStyleSheet('ie800');
	} else {
		loadStyleSheet('ff800');
	}
} else {
	if (!isIE) {
		loadStyleSheet('ff1024');
	}
}