var im_path = 'img/';
var eX = '.gif'

//Preload Nav
var home_ = new Image();
home_.src  = im_path + 'home_' + eX;
var do_ = new Image();
do_.src  = im_path + 'do_' + eX;
var do2_ = new Image();
do2_.src = im_path + 'do2_' + eX;
var asses_ = new Image();
asses_.src = im_path + 'asses_' + eX;
var contact_ = new Image();
contact_.src = im_path + 'contact_' + eX;
var email_ = new Image();
email_.src  = im_path + 'email_' + eX;
//Preload Other
var txt12_ = new Image();
txt12_.src  = im_path + 'txt12_' + eX;

//Swap
var im = new Array('home', 'do', 'do2', 'asses', 'contact', 'email', 'txt12');

function swap_im(button,pos){
for (i = 0; i < im.length; i++){
	if (button == im[i]) {//alert(im_path + button + pos + eX);
document.images[button].src = im_path + button + pos + eX;}
	}
}