var selected = "null";

var bn = navigator.appName;
var vn = navigator.appVersion;
var isNav = false;
if ( bn == "Netscape" )
	isNav = true;


menuimg = new Array(16);
menuimg[1]= new Image (0,0);
menuimg[1].src="images/nav_profile1.gif";
menuimg[2]= new Image (0,0);
menuimg[2].src="images/nav_profile2.gif";
menuimg[3]= new Image (0,0);
menuimg[3].src="images/nav_principles1.gif";
menuimg[4]= new Image (0,0);
menuimg[4].src="images/nav_principles2.gif";
menuimg[5]= new Image (0,0);
menuimg[5].src="images/nav_updates1.gif";
menuimg[6]= new Image (0,0);
menuimg[6].src="images/nav_updates2.gif";
menuimg[7]= new Image (0,0);
menuimg[7].src="images/nav_contact1.gif";
menuimg[8]= new Image (0,0);
menuimg[8].src="images/nav_contact2.gif";

function on_img(loc,img)
{
	// Don't roll-over if image is selected
 	if (selected != loc.name)
	{	
		loc.src=menuimg[img].src;
	}
}

function turnOffImages(img)
{
	if (isNav)
	{
		switch ( img ) 
		{
			case "p1":
				document.p1.src = menuimg[1].src;
				break;
			case "p2":
				document.p2.src = menuimg[3].src;
				break;
			case "p3":
				document.p3.src = menuimg[5].src;
				break;
			case "p4":
				document.p4.src = menuimg[7].src;
				break;
		}
	}
	else
	{
	switch ( img ) 
		{
			case "p1":
				document.p1.src = menuimg[1].src;
				break;
			case "p2":
				document.p2.src = menuimg[3].src;
				break;
			case "p3":
				document.p3.src = menuimg[5].src;
				break;
			case "p4":
				document.p4.src = menuimg[7].src;
				break;
		}
	}
}