// JavaScript Document


var currImg = 1;
var imgCt = 34;

function initAll() {
	
	document.getElementById("prevLink").src="/images/timeline/empty.gif";
	document.getElementById("nextLink").src="/images/timeline/button_right.jpg";
     document.getElementById("prevLink").onclick = processPrevious;
	document.getElementById("nextLink").onclick = processNext;
}

function processPrevious() {

	if(currImg != 1) {
		newSlide(-1);
		document.getElementById("prevLink").src="/images/timeline/button_left.jpg";
		document.getElementById("nextLink").src="/images/timeline/button_right.jpg";
	}
	
	if(currImg == 1) {
		document.getElementById("prevLink").src="/images/timeline/empty.gif";
	}
}

function processNext() {

	if(currImg != imgCt-1) {
		newSlide(1);
		document.getElementById("prevLink").src="/images/timeline/button_left.jpg";
		document.getElementById("nextLink").src="/images/timeline/button_right.jpg";
	}
	if (currImg == imgCt-1) { 
		document.getElementById("nextLink").src="/images/timeline/empty.gif";
	}

}

function newSlide(direction) {

	currImg = currImg + direction;

}