var bg = new Image();
			var url = "workimage/bg.museo.jpg";
			$(function(){
				var readyTime = new Date().getTime();
				$(bg).load(function()
				{
					$('#body_background').css({
						'background': 'url('+url+') no-repeat center top'
					});
					if (new Date().getTime()-readyTime>100)
					{
						$('#body_background').hide();
						$('#body_background').fadeIn(1000);
					}
				});
				bg.src = url;
			})