function load() {
	if (document.images) {
		this.length=load.arguments.length;
		for (var i=0;i<this.length;i++) {
			this[i+1]=new Image();
			this[i+1].src=load.arguments[i];
		}
	}
}
function preload() {
	var temp=new load("../images/app1/A1.jpg",
					  "../images/app1/A2.jpg",
					  "../images/app1/A4.jpg",
					  "../images/app1/A5.jpg",
					  "../images/app1/A6.jpg",
					  "../images/app1/A7.jpg",
					  "../images/app2/B1.jpg",
					  "../images/app2/B2.jpg",
					  "../images/app2/B4.jpg",
					  "../images/app2/B5.jpg",
					  "../images/app2/B6.jpg",
					  "../images/app2/B7.jpg",
					  "../images/app3/C2.jpg",
					  "../images/app3/C3.jpg",
					  "../images/app3/C4.jpg",
					  "../images/app3/C5.jpg",
					  "../images/app3/C6.jpg",
					  "../images/app3/C7.jpg",
					  "../images/app4/D1.jpg",
					  "../images/app4/D2.jpg",
					  "../images/app4/D4.jpg",
					  "../images/app4/D5.jpg",
					  "../images/app4/D6.jpg",
					  "../images/app4/D7.jpg")
}

if(document.addEventListener) document.addEventListener('load', preload, false);
else document.attachEvent('onload', preload);