function HMBchoose() {
	var homemainbox = new Array("img/img_homemainbox_1.jpg", "img/img_homemainbox_2.jpg", "img/img_homemainbox_3.jpg");
	var hmbNum = Math.floor(Math.random() * homemainbox.length);
	document.write('<img src="' +homemainbox[hmbNum]+ '">');
}
	
function HRUBchoose() {
	var homerightupperbox = new Array("img/img_homerightupperbox_1.jpg", "img/img_homerightupperbox_2.jpg", "img/img_homerightupperbox_3.jpg");
	var hrubNum = Math.floor(Math.random() * homerightupperbox.length);
	document.write('<img src="' +homerightupperbox[hrubNum]+ '">');
}
	
function HRLBchoose() {
	var homerightlowerbox = new Array("img/img_homerightlowerbox_1.jpg", "img/img_homerightlowerbox_2.jpg", "img/img_homerightlowerbox_3.jpg");
	var hrlbNum = Math.floor(Math.random() * homerightlowerbox.length);
	document.write('<img src="' +homerightlowerbox[hrlbNum]+ '">');
}