//does a double image rollover swap, currently used on residences page only
function single_roll_over(img_name_a, img_src_a) {
	document[img_name_a].src = img_src_a;
}


function double_roll_over(img_name_a, img_src_a, img_name_b, img_src_b) {
	document[img_name_a].src = img_src_a;
	document[img_name_b].src = img_src_b;
}