$(document).ready(function() {
		var $winwidth = $(window).width();
		$("img.full_bg").css("position","absolute");
		$("img.full_bg").css("top","0px");
		$("img.full_bg").css("left","0px");

		$("img.full_bg").attr({
			width: $winwidth
		});
		$(window).bind("resize", function(){
			var $winwidth = $(window).width();
			$("img.full_bg").attr({
				width: $winwidth
			});
		 });
	});