// preload the navigation nav buttons

nav1_off = new Image;
nav1_off.src = "../menu/home.gif";

nav1_on = new Image;
nav1_on.src = "../menu/home-.gif";

nav2_off = new Image;
nav2_off.src = "../menu/about.gif";

nav2_on = new Image;
nav2_on.src = "../menu/about-.gif";

nav3_off = new Image;
nav3_off.src = "../menu/eng.gif";

nav3_on = new Image;
nav3_on.src = "../menu/eng-.gif";

nav4_off = new Image;
nav4_off.src = "../menu/it.gif";

nav4_on = new Image;
nav4_on.src = "../menu/it-.gif";

nav5_off = new Image;
nav5_off.src = "../menu/pm.gif";

nav5_on = new Image;
nav5_on.src = "../menu/pm-.gif";

nav6_off = new Image;
nav6_off.src = "../menu/admin.gif";

nav6_on = new Image;
nav6_on.src = "../menu/admin-.gif";

nav7_off = new Image;
nav7_off.src = "../menu/maint.gif";

nav7_on = new Image;
nav7_on.src = "../menu/maint-.gif";

nav8_off = new Image;
nav8_off.src = "../menu/crs.gif";

nav8_on = new Image;
nav8_on.src = "../menu/crs-.gif";

nav9_off = new Image;
nav9_off.src = "../menu/careers.gif";

nav9_on = new Image;
nav9_on.src = "../menu/careers-.gif";

nav10_off = new Image;
nav10_off.src = "../menu/employee.gif";

nav10_on = new Image;
nav10_on.src = "../menu/employee-.gif";

nav11_off = new Image;
nav11_off.src = "../menu/contact.gif";

nav11_on = new Image;
nav11_on.src = "../menu/contact-.gif";

var doc = "document.";

function rollover(num,chg,obj) {
	var navobj = eval(doc+obj);
	navobj.src = eval('nav' + num + '_' + chg + '.src');
}