window.onresize = window.onload = function(){
					var w,h
					if(!!(window.attachEvent && !window.opera))
					{
						h = document.documentElement.clientHeight;
						w = document.documentElement.clientWidth;
					}else{
						h =	window.innerHeight;
						w = window.innerWidth;
					}
		document.getElementById('msg').value  ;
				var bgImg = document.getElementById('bg').getElementsByTagName('img')[0];
				bgImg.width = (w -0);
				bgImg.height= (h -0) ;		
										
			}