var popup_array = new Array();

var topnav_kids = new Image();
var topnav_kids_b = new Image();

topnav_kids.src = "/images/topnav_kids.gif";
topnav_kids_b.src = "/images/topnav_kids_b.gif";

var image_array = new Array();
image_array[0]=topnav_kids.src;
image_array[1]=topnav_kids_b.src;

function mouse_action(who,image_index) {
who.src = image_array[image_index];

}