// preload images
// image folder
var imgf = 'images/nav/';

nav = new Array('1','2','3','4','5','6','7');
navover = new Array('o1','o2','o3','o4','o5','o6','o7');

// main images
var counter = 1;
for (counter in nav) {
	nav[counter] = new Image();
	nav[counter].src = imgf + 'nav_0' + counter + '.gif';
}

// mouse over images
var counter = 1;
for (counter in navover) {
	navover[counter] = new Image();
	navover[counter].src = imgf + 'navover_0' + counter + '.gif';
}

function rollout(imgname, imgno){
document.images[imgname].src = nav[imgno].src;
return true;
}

function rollover(imgname, imgno){
document.images[imgname].src = navover[imgno].src;
return true;
}