function random() {
	var r = Math.floor(Math.random()*2);
	// ^ change number to number of array elements
	// image, colour, top coordinate, left coordinate
	var d = [["#8ca7d3","home1.jpg","150px","145px"],["#8ca7d3","home2.jpg","230px","0px"]];
	document.getElementById("bodyhome").style.backgroundColor = d[r][0];
	document.getElementById("bodyhome").style.backgroundImage = "url(images/" + d[r][1] + ")";
	document.getElementById("main").style.marginTop = d[r][2];
	document.getElementById("main").style.marginLeft = d[r][3];	
}

function preload() {
	var menu1on = document.createElement('img');
	var menu2on = document.createElement('img');
	var menu3on = document.createElement('img');
	var menu4on = document.createElement('img');
	var menu5on = document.createElement('img');
	var menu6on = document.createElement('img');
	menu1on.setAttribute('src','images/menu1on.png');
	menu2on.setAttribute('src','images/menu2on.png');
	menu3on.setAttribute('src','images/menu3on.png');
	menu4on.setAttribute('src','images/menu4on.png');
	menu5on.setAttribute('src','images/menu5on.png');
	menu6on.setAttribute('src','images/menu6on.png');
}