//do the browser detection stuff

bName = navigator.appName; 	// Detect if browser is Netscape 3 + or IE 4 +.
bVer = parseInt(navigator.appVersion);
if ((bName == "Netscape" && bVer >= 3) ||
	(bName == "Microsoft Internet Explorer" && bVer >= 4)) br ="n3";
	else br ="n2";
	 


function imgOn(imgName) {		//function to activate images.
if (br == "n3") {
document[imgName].src = eval(imgName + "on.src");

}
}


function imgOff(imgName) {		//function to de-activate images.
if (br == "n3") {
document[imgName].src = eval(imgName + "off.src");

}
}

// Create image objects, preload all active and inactive images.

if (br == "n3") {


img1on = new Image(); 
img1on.src = "graphics/NavCoursesOn.gif"; 
img2on = new Image(); 
img2on.src = "graphics/NavClimbingAreasOn.gif";
img3on = new Image(); 
img3on.src = "graphics/NavGuidesOn.gif";
img4on = new Image(); 
img4on.src = "graphics/NavRMCSOn.gif";
img5on = new Image(); 
img5on.src = "graphics/NavHomeOn.gif";



img1off = new Image(); 
img1off.src = "graphics/NavCourses.gif"; 
img2off = new Image(); 
img2off.src = "graphics/NavClimbingAreas.gif";
img3off = new Image(); 
img3off.src = "graphics/NavGuides.gif";
img4off = new Image(); 
img4off.src = "graphics/NavRMCS.gif";
img5off = new Image(); 
img5off.src = "graphics/NavHome.gif";
}

//	rotating billboard function
	if (br== "n3"){
	boardNum = 0;
	boardSpeed = 2500;
//
// added image dimensions
	billboards = new Array();
	billboards[0] = new Image(150,195);
	billboards[0].src = "graphics/diana.jpg"
	billboards[1] = new Image(150,195);
	billboards[1].src = "graphics/Praying-Mts.jpg"
	billboards[2] = new Image(150,195);
	billboards[2].src = "graphics/ontop.jpg"
	billboards[3] = new Image(150,195);
	billboards[3].src = "graphics/Red-Mountains.jpg"
	billboards[4] = new Image(150,195);
	billboards[4].src = "graphics/cdd.jpg"


	}
function rotateBoard(){
//
if (boardNum < billboards.length - 1) boardNum++;
	else boardNum = 0;
	document.billboard.src = billboards[boardNum].src;

	setTimeout('rotateBoard()', boardSpeed);
}