ns4 = (document.layers)? true:false
ie4	 = (document.all)? true:false
	
navSrc = new Array()
navSrc[0] = "images/navOff.gif"
navSrc[1] = "images/navHome.gif"
navSrc[2] = "images/navPort.gif"
navSrc[3] = "images/navDial.gif"
navSrc[4] = "images/navArch.gif"
navSrc[5] = "images/navInfo.gif"

navImg = new Array()

for(i=0; i < navSrc.length; i++) {   
	navImg[i] = new Image()   
	navImg[i].src = navSrc[i]
}

function swapImg(num){
	document.nav.src = navImg[num].src
}


function openWin(url,w,h) {  
	if (w == "" || h == "" ){
		w = 300;
		h = 300;
	}
	window.open(url, "movingImage", "resizable=no,scrollbars=no,width=" + w + ",height=" + h + ",status=yes,left=100,top=100")
}

function show(id) {
	if (ns4) document.layers[id].visibility = "show"
	else if (ie4) document.all[id].style.visibility = "visible"
}

function hide(id) {
	if (ns4) document.layers[id].visibility = "hide"
	else if (ie4) document.all[id].style.visibility = "hidden"
}