function getElem (elemId) { 
	if (document.all) { 
		return (document.all[elemId]); 
	} 
	else if (document.getElementById) { 
		return (document.getElementById (elemId)); 
	} 
	else 
		return (false); 
}

function setClass(objectID,newClass) {
	var object = getElem(objectID);
	object.className = newClass;
}

function showID(objectID) {
	var object = getElem(objectID);
	object.style.display = "block";
}

function hideID(objectID) {
	var object = getElem(objectID);
	object.style.display = "none";
}

function nav1Over(item) {
	switch (item) {
		case 1 :
			setClass('nav1Item1','nav1Item1');
			showID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar3');
			hideID('nav2Bar4');
			hideID('nav2Bar5');
			hideID('nav2Bar6');
			hideID('nav2Bar7');
			break;
		case 2 :
			setClass('nav1Item2','nav1Item2');
			showID('nav2Bar2');
			hideID('nav2Bar1');
			hideID('nav2Bar3');
			hideID('nav2Bar4');
			hideID('nav2Bar5');
			hideID('nav2Bar6');
			hideID('nav2Bar7');
			break;
		case 3 :
			setClass('nav1Item3','nav1Item3');
			showID('nav2Bar3');
			hideID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar4');
			hideID('nav2Bar5');
			hideID('nav2Bar6');
			hideID('nav2Bar7');
			break;
		case 4 :
			setClass('nav1Item4','nav1Item4');
			showID('nav2Bar4');
			hideID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar3');
			hideID('nav2Bar5');
			hideID('nav2Bar6');
			hideID('nav2Bar7');
			break;
		case 5 :
			setClass('nav1Item5','nav1Item5');
			showID('nav2Bar5');
			hideID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar3');
			hideID('nav2Bar4');
			hideID('nav2Bar6');
			hideID('nav2Bar7');
			break;
		case 6 :
			setClass('nav1Item6','nav1Item6');
			showID('nav2Bar6');
			hideID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar3');
			hideID('nav2Bar4');
			hideID('nav2Bar5');
			hideID('nav2Bar7');
			break;
		case 7 :
			setClass('nav1Item7','nav1Item7');
			showID('nav2Bar7');
			hideID('nav2Bar1');
			hideID('nav2Bar2');
			hideID('nav2Bar3');
			hideID('nav2Bar4');
			hideID('nav2Bar5');
			hideID('nav2Bar6');
			break;
		default :
			break;
	} 
}

function nav1Out(item) {
	switch (item) {
		case 1 :
			setClass('nav1Item1','nav1Item');
			break;
		case 2 :
			setClass('nav1Item2','nav1Item');
			break;
		case 3 :
			setClass('nav1Item3','nav1Item');
			break;
		case 4 :
			setClass('nav1Item4','nav1Item');
			break;
		case 5 :
			setClass('nav1Item5','nav1Item');
			break;
		case 6 :
			setClass('nav1Item6','nav1Item');
			break;
		case 7 :
			setClass('nav1Item7','nav1Item');
			break;
		default :
			break;
	} 
}

function multipleImages(total,img) {
	switch (total) {
		case 2 :
			switch (img) {
				case 1 :
					showID('img1');
					showID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					break;
				case 2 :
					showID('img2');
					showID('imgDesc2');
					hideID('img1');
					hideID('imgDesc1');
					break;
				default :
					break;
			} 
			break;
		case 3 :
			switch (img) {
				case 1 :
					showID('img1');
					showID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					break;
				case 2 :
					showID('img2');
					showID('imgDesc2');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img3');
					hideID('imgDesc3');
					break;
				case 3 :
					showID('img3');
					showID('imgDesc3');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					break;
				default :
					break;
			} 
			break;
		case 4 :
			switch (img) {
				case 1 :
					showID('img1');
					showID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img4');
					hideID('imgDesc4');
					break;
				case 2 :
					showID('img2');
					showID('imgDesc2');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img4');
					hideID('imgDesc4');
					break;
				case 3 :
					showID('img3');
					showID('imgDesc3');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img4');
					hideID('imgDesc4');
					break;
				case 4 :
					showID('img4');
					showID('imgDesc4');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					break;
				default :
					break;
			} 
			break;
		case 5 :
			switch (img) {
				case 1 :
					showID('img1');
					showID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img4');
					hideID('imgDesc4');
					hideID('img5');
					hideID('imgDesc5');
					break;
				case 2 :
					showID('img2');
					showID('imgDesc2');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img4');
					hideID('imgDesc4');
					hideID('img5');
					hideID('imgDesc5');
					break;
				case 3 :
					showID('img3');
					showID('imgDesc3');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img4');
					hideID('imgDesc4');
					hideID('img5');
					hideID('imgDesc5');
					break;
				case 4 :
					showID('img4');
					showID('imgDesc4');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img5');
					hideID('imgDesc5');
					break;
				case 5 :
					showID('img5');
					showID('imgDesc5');
					hideID('img1');
					hideID('imgDesc1');
					hideID('img2');
					hideID('imgDesc2');
					hideID('img3');
					hideID('imgDesc3');
					hideID('img4');
					hideID('imgDesc4');
					break;
				default :
					break;
			} 
			break;
		default :
			break;
	} 
}