function navOn(num){
		var obj = document.getElementById('nav');
		var obj2 = document.getElementById('subnav');
		obj.style.backgroundImage='url(images/nav' + num + '.gif)';
		if (num==3){
			obj2.style.display='block';
		}else{ obj2.style.display='none'; }
	}
	function navReset(){
		navOn(setNav);
	}
	
	function navOff(e)
	{
	if (!e) var e = window.event;
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	}

var myimages=new Array()
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages[i]=new Image()
myimages[i].src=preloadimages.arguments[i]
}
}

preloadimages("images/nav1.gif","images/nav2.gif","images/nav3.gif","images/nav4.gif","images/nav5.gif")


function openprintable(id)
{
var height = (screen.height / 100) * 75
window.open("printarticle.aspx", null, "scrollbars=yes,height=" + height +",width=850,status=no,toolbar=no,menubar=no,location=no");
}