$(document).ready(function() {
	if ((screen.width <= 1024) && (screen.height <= 768)) {
		$("body").css('background-image','url(/images/bg/1024.jpg)');
	}
	else if ((screen.width <= 1280) && (screen.height <= 800)) {
		$("body").css('background-image','url(/images/bg/1280.jpg)');
	}
	else if ((screen.width <= 1920) && (screen.height <= 1080)) {
		$("body").css('background-image','url(/images/bg/1920.jpg)');
	}
	else {
		$("body").css('background-image','url(/images/bg/1920.jpg)');
	}

});