//preload images for navigation
nav_home_on = new Image();
nav_home_on = '../images/nav_home_on.gif';

nav_about_on = new Image();
nav_about_on = '../images/nav_about_on.gif';

nav_curriculum_on = new Image();
nav_curriculum_on = '../images/nav_curriculum_on.gif';

nav_programs_on = new Image();
nav_programs_on = '../images/nav_programs_on.gif';

nav_activities_on = new Image();
nav_activities_on = '../images/nav_activities_on.gif';

nav_info_on = new Image();
nav_info_on = '../images/nav_info_on.gif';

nav_registration_on = new Image();
nav_registration_on = '../images/nav_registration_on.gif';

nav_calendar_on = new Image();
nav_calendar_on = '../images/nav_calendar_on.gif';

nav_updates_on = new Image();
nav_updates_on = '../images/nav_updates_on.gif';

//stop preloadin' ../images

function navOn(imName) {
		if (document.images) { 
		document.images[imName].src = '../images/' + imName + "_on.gif"
			 };
}
function navOff(imName) {
		if (document.images) { 
		document.images[imName].src = '../images/' + imName + '.gif' 
		};
}