function preloadImages(){
	for(i=0;i<imgArray.length;i++){
		newImage[i] = new Image();
		newImage[i].src = imgArray[i];
	}
}

function showTab(index){
	var tempL = document.getElementById("tabL"+index);
	var tempR = document.getElementById("tabR"+index);
	var tempImage = document.getElementById("tabI"+index);
	var tempClass = document.getElementById("tab"+index);

	tempL.src = "images/nav_onL.jpg";
	tempR.src = "images/nav_onR.jpg";
	tempImage.src = "images/nav_image.jpg";
	tempClass.className = "navOn";
}
function hideTab(index){
	var tempL = document.getElementById("tabL"+index);
	var tempR = document.getElementById("tabR"+index);
	var tempClass = document.getElementById("tab"+index);
	var tempImage = document.getElementById("tabI"+index);
	
	tempL.src = "images/nav_offL.jpg";
	tempR.src = "images/nav_offR.jpg";
	tempImage.src = "images/placeholder.gif";
	tempClass.className = "navOff";
}