function load_CSS(){
 	var wd = screen.width;
 	if (wd <= 800){
		//CSS.load('css/resource_800x600.css');
		document.write('<link rel="stylesheet" href="css/resource_800x600.css" type="text/css">');	
	} 
	else if (wd == 1024){
		//CSS.load('css/resource_800x600.css');
		document.write('<link rel="stylesheet" href="css/resource_1024x768.css" type="text/css">');	
	} 
}

load_CSS();