function nav(id) {
	if(document.getElementById) {
		var source = document.getElementById(id).src;
		if(source.indexOf('0') != -1) {
			document.getElementById(id).src = "assets/images/" + id + "_1.gif";
		} else {
			document.getElementById(id).src = "assets/images/" + id + "_0.gif";
		}
	}
}
function navOn(id) {
	if(document.getElementById) {
		document.getElementById(id).src = "assets/images/" + id + "_1.gif";
	}
}
function navOff(id) {
	if(document.getElementById) {
		document.getElementById(id).src = "assets/images/" + id + "_0.gif";
	}
}
function printerFriendly(tog,h) {
	var url = window.location.toString();
	if(url.indexOf("?") != -1) {
		window.location = url+'&print=yesplease';
	} else {
		window.location = url+'?print=yesplease';
	}
}