navClose = new Image();
navClose.src = "images/popNavArrowLeft.gif"
navOpen = new Image();
navOpen.src = "images/popNavArrowRight.gif"
function navToggle(){
	if (document.getElementById("popNav").style.display != 'none') {
		document.getElementById("popNavArrow").src = navOpen.src;
		document.getElementById("popNav").style.display = 'none';
	} else {
		document.getElementById("popNavArrow").src = navClose.src;
		document.getElementById("popNav").style.display = 'block';
	}
}