function fnSelectStyleSheet(){

if (screen.width < 801) {
	document.write('<link rel="Stylesheet" type="text/css" href="styles_S.css" title="Basic Styles" media="all">');
}
if (screen.width > 800 && screen.width <= 1024) {
	document.write('<link rel="Stylesheet" type="text/css" href="styles_M.css" title="Basic Styles" media="all">');
}
if (screen.width > 1024) {
	document.write('<link rel="Stylesheet" type="text/css" href="styles_L.css" title="Basic Styles" media="all">');
}

}