//preload header images
var nav_names = new Array("education", "information", "about", "members", "foundation", "press", "home", "search", "contact");
var c = nav_names.length, i = 0, nav_over = new Array(c), nav_off = new Array(c);

while (i < c) {
 nav_over[i] = new Image();
 nav_over[i].src = "http://www.common.org/images/nav/sec_" + nav_names[i] + "_over.gif";
 nav_off[i] = new Image();
 nav_off[i].src = "http://www.common.org/images/nav/sec_" + nav_names[i] + ".gif";
 i++;
}

// header imageswap functions
function over(x) {document[nav_names[x]].src = nav_over[x].src;}
function out(x) {document[nav_names[x]].src = nav_off[x].src;}