// JavaScript Document

var imgContainer;
var frameTag = "p";
var currentFrame = 0;
var elements;

function initSlideShow() {
	if(!document.getElementById('slideShowCont')) { return false; }
	var imgContainer = document.getElementById('slideShowCont');
	elements = imgContainer.getElementsByTagName(frameTag);
	for(var x=0; x<elements.length; x++) {
		elements[x].style.display = "none";
	}
	elements[0].style.display = "block";
	currentFrame = 0;
	
	prevBtn = document.createElement("a");
	prevBtn.setAttribute("id", "slideshowPrevBtn");
	prevBtn.href = "javascript:void(0);";
	prevBtn.innerHTML = "&laquo;Back";
	prevBtn.className = "prevNext inactive";
	imgContainer.appendChild(prevBtn);
	
	nextBtn = document.createElement("a");
	nextBtn.setAttribute("id", "slideshowNextBtn");
	nextBtn.href = "javascript:void(0);";
	nextBtn.onclick = function() { nextSlide(); };
	nextBtn.innerHTML = "&nbsp;Continue&raquo;";
	nextBtn.className = "prevNext";
	imgContainer.appendChild(nextBtn);
	
	nextSlide();
	deactivatePrev();
	

}

function nextSlide() {
	elements[currentFrame].style.display = "none";
	elements[parseInt(currentFrame+1)].style.display = "block";
	currentFrame++;
	document.getElementById('slideshowPrevBtn').onclick = function() { prevSlide(); };
	document.getElementById('slideshowPrevBtn').className = document.getElementById('slideshowPrevBtn').className.replace(/inactive/, "");
	if(currentFrame == elements.length-1) {
		document.getElementById('slideshowNextBtn').onclick = "";
		document.getElementById('slideshowNextBtn').className = document.getElementById('slideshowNextBtn').className + " inactive";
	} else {
		document.getElementById('slideshowNextBtn').onclick = function() { nextSlide(); };
	}
	

}

function prevSlide() {
	elements[currentFrame].style.display = "none";
	elements[parseInt(currentFrame-1)].style.display = "block";
	currentFrame--;
	document.getElementById('slideshowNextBtn').onclick = function() { nextSlide(); };
	document.getElementById('slideshowNextBtn').className = document.getElementById('slideshowNextBtn').className.replace(/inactive/, "");
	if(currentFrame <= 1) {
		document.getElementById('slideshowPrevBtn').onclick = "";
		document.getElementById('slideshowPrevBtn').className = document.getElementById('slideshowPrevBtn').className + " inactive";
	} else {
		document.getElementById('slideshowPrevBtn').onclick = function() { prevSlide(); };
	}
}

function deactivatePrev() {
	document.getElementById('slideshowPrevBtn').onclick = "";
	document.getElementById('slideshowPrevBtn').className = document.getElementById('slideshowPrevBtn').className + " inactive";
}
	

if(window.onload) {
	oldOnload = window.onload;
	window.onload = function() { oldOnload(); initSlideShow();  };
} else {
	window.onload = function() { initSlideShow();  };
}