function preloadNav() {
		preload1 = new Image(128, 15); preload1.src = "images/lnav-lrn-home_on.gif";
		preload2 = new Image(128, 15); preload2.src = "images/lnav-lrn-solu_on.gif";
		preload3 = new Image(128, 15); preload3.src = "images/lnav-lrn-lear_on.gif";
		preload4 = new Image(128, 15); preload4.src = "images/lnav-ta-indi_on.gif";
		preload5 = new Image(128, 15); preload5.src = "images/lnav-ta-corp_on.gif";
		preload6 = new Image(128, 15); preload6.src = "images/lnav-ta-comm_on.gif";
		preload7 = new Image(128, 15); preload7.src = "images/lnav-ta-dona_on.gif";
		preload8 = new Image(128, 15); preload8.src = "images/lnav-tp-even_on.gif";
		preload9 = new Image(128, 15); preload9.src = "images/lnav-tp-toque_on.gif";
		preload10 = new Image(128, 15); preload10.src = "images/lnav-tp-come_on.gif";
		preload11 = new Image(128, 15); preload11.src = "images/lnav-ss-best_on.gif";
		preload12 = new Image(128, 15); preload12.src = "images/lnav-ss-case_on.gif";
		preload13 = new Image(128, 15); preload13.src = "images/lnav-ss-reso_on.gif";
		preload14 = new Image(128, 15); preload14.src = "images/lnav-au-our_on.gif";
		preload15 = new Image(128, 15); preload15.src = "images/lnav-au-comm_on.gif";		
		preload16 = new Image(128, 15); preload16.src = "images/lnav-au-part_on.gif";
				
		preload17 = new Image(128, 15); preload17.src = "images/lnav-au-our_on.gif";																																
	}