// Function to cache nav images.
if (document.images) {
		//Main Nav
        home_off = new Image();
		home_off.src = ""+imageDir+"nav_home.gif";
        home_over = new Image();
		home_over.src = ""+imageDir+"nav_home_2.gif";
        about_off = new Image();
		about_off.src = ""+imageDir+"nav_aboutwings.gif";
        about_over = new Image();
		about_over.src = ""+imageDir+"nav_aboutwings_2.gif";
        programs_off = new Image();
		programs_off.src = ""+imageDir+"nav_ourprograms.gif";
        programs_over = new Image();
		programs_over.src = ""+imageDir+"nav_ourprograms_2.gif";
        schedule_off = new Image();
		schedule_off.src = ""+imageDir+"nav_schedule.gif";
        schedule_over = new Image();
		schedule_over.src = ""+imageDir+"nav_schedule_2.gif";
        news_off = new Image();
		news_off.src = ""+imageDir+"nav_news.gif";
        news_over = new Image();
		news_over.src = ""+imageDir+"nav_news_2.gif";
        donors_off = new Image();
		donors_off.src = ""+imageDir+"nav_donors.gif";
        donors_over = new Image();
		donors_over.src = ""+imageDir+"nav_donors_2.gif";
        alumni_off = new Image();
		alumni_off.src = ""+imageDir+"nav_wingsalumni.gif";
        alumni_over = new Image();
		alumni_over.src = ""+imageDir+"nav_wingsalumni_2.gif";
        resources_off = new Image();
		resources_off.src = ""+imageDir+"nav_additionalresources.gif";
        resources_over = new Image();
		resources_over.src = ""+imageDir+"nav_additionalresources_2.gif";
		}	
		//end image cache
		
				
// Function to 'activate' nav images.
function imgOver(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "_over.src");
        }
}

// Function to 'deactivate' nav images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "_off.src");
        }
}

//OPEN NEW WINDOW FUNCTION: Enlarge Thumbnail
function openWinTh(url,w,h,winname) {
	leftWin = (screen.availWidth - w) / 5;
	topWin = (screen.availHeight - h) / 5;
	props = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width="+w+",height="+h+",top="+topWin+",screenY="+topWin+",left="+leftWin+",screenX="+leftWin
	var thwin = window.open(url,winname,props)
	thwin.focus()
}