var mytimer = 0;
var currentIdx = -1;
var LAST_IDX = imageNames.length;
var arrImages = new Array();

function preloadImages() { 
	
	var img = null; 
	for(var i = 0; i < LAST_IDX ; i++) { 
		img = new Image(); 
		img.src = imageNames[i]; 
		arrImages[i] = img; 
	
	} 
}

function startSlideShow() {
    preloadImages();
    roll();
}

function roll() {
	
	currentIdx++;
    if (currentIdx == LAST_IDX)
        currentIdx = 0;
    turnOn();
	
	mytimer = window.setTimeout("roll()", 3000);
}

function turnOn() { 
	if (mytimer != 0) window.clearTimeout(mytimer);
	blendimage("blenddiv", "sImg", arrImages[currentIdx].src, 400);
	document.getElementById("imageLink").href = imageLinks[currentIdx];
}