function changeThemeImage(theme) {
	document.images["theme"].src = "http://www.partyzinabox.co.uk/images/" + theme + "/pb_img_" + theme + ".jpg";
}

function changeBagImage(bag) {
	document.images["bag"].src = "http://www.partyzinabox.co.uk/images/bags/pb_img_" + bag + "_bag.jpg";
}

function changeBoxImage(bag) {
	document.images["box"].src = "http://www.partyzinabox.co.uk/images/bags/pb_img_" + bag + "_bag.jpg";
}

function changeTinImage(bag) {
	document.images["tin"].src = "http://www.partyzinabox.co.uk/images/bags/pb_img_" + bag + "_bag.jpg";
}