if (document.images) {
	 //preload all the regular tabs
	 for (i=1; i<11; i++) {
	 	img = new Array();
		img[i] = new Image();
		img[i].src = "http://images.military.com/pics/nav/tab" + i + "n.gif";
	 }
	 //preload all the blue tabs
	 for (i=1; i<11; i++) {
	 	imgb = new Array();
		imgb[i] = new Image();
		imgb[i].src = "http://images.military.com/pics/nav/tab" + i + "nh.gif";
	 }
	 //preload all the white tabs
	 for (i=1; i<11; i++) {
	 	imgw = new Array();
		imgw[i] = new Image();
		imgw[i].src = "http://images.military.com/pics/nav/tab" + i + "nw.gif";
	 }
}

function HideAll() {
		ShowHideLayer('menu1','hidden');
		ShowHideLayer('menu2','hidden');
		ShowHideLayer('menu3','hidden');
		ShowHideLayer('menu4','hidden');
		ShowHideLayer('menu5','hidden');
		ShowHideLayer('menu6','hidden');
		ShowHideLayer('menu7','hidden');
		ShowHideLayer('menu8','hidden');		
		ShowHideLayer('menu9','hidden');
		ShowHideLayer('menu10','hidden');									
}
	
function ShowHideLayer(id, display) {
		document.getElementById(id).style.visibility=display;
}
	
function ShowDropdown(id,fbox) {
		HideAll();
		document.getElementById('tab'+id).src="http://images.military.com/pics/nav/tab" + id + "nw.gif";
		layer = 'menu' + id;
		ShowHideLayer(layer, 'visible');		
		if (fbox != "na") {	document.getElementById(fbox).style.display="none";	}
}
	
		
function HideDropdown(id, flag, fbox) {
		SwapBG(id, flag);
		layer = 'menu' + id;
		ShowHideLayer(layer, 'hidden');
		if (fbox != "na") {	document.getElementById(fbox).style.display="block"; }
}
	
function SwapBG(id, flag) {
		if ( flag == "h") {
			document.getElementById('tab'+id).src="http://images.military.com/pics/nav/tab" + id + "nh.gif";
		} else {
			document.getElementById('tab'+id).src="http://images.military.com/pics/nav/tab" + id + "n.gif";
		}
		
}