var ygp_pics = new Array();
ygp_pics[0] = 'head-img1.jpg'; 
ygp_pics[1] = 'head-img2.jpg'; 
ygp_pics[2] = 'head-img3.jpg'; 
ygp_pics[3] = 'head-img4.jpg'; 
ygp_pics[3] = 'head-img5.jpg'; 

var timePerSlide = 6000;
var timeTransition = 1000;

var activeLayer = 'layerA';

$(document).ready(function() {
	
	$('#img-slide').append('<div id="layerA" style="position:absolute;"></div>');
	$('#img-slide').append('<div id="layerB" style="position:absolute;"></div>');
	$('#img-slide #layerA').append('<img class="p" src="images/slide/' + getRandomPic() + '" width="418" height="285" />');
	$('#img-slide #layerB').append('<img class="p" src="" width="418" height="285" />');
	$('#img-slide #layerB').hide();
	
	loadNewPics();
	
	setTimeout('swapPics()', timePerSlide);

})

function swapPics() {
	
	if (activeLayer == 'layerB') {
	
		$('#img-slide #layerB').fadeOut(timeTransition);
		$('#img-slide #layerA').fadeIn(timeTransition, function() {
			activeLayer = 'layerA';
			loadNewPics();			
		});
		
	} else {

		$('#img-slide #layerA').fadeOut(timeTransition);
		$('#img-slide #layerB').fadeIn(timeTransition, function() {
			activeLayer = 'layerB';
			loadNewPics();			
		});
	
	}
	
	setTimeout('swapPics()', timePerSlide);
	
}

function loadNewPics() {

	var randomPic = '';
	var randomQuote = '';	

	if (activeLayer == 'layerA') {
		inactiveLayer = 'layerB';
	} else {
		inactiveLayer = 'layerA';		
	}
	
	do {
		randomPic = 'images/slide/' + getRandomPic();
	} while (randomPic == $('#img-slide #' + activeLayer + ' img.p').attr('src'));
	
	$('#img-slide #' + inactiveLayer + ' img.p').attr('src', randomPic);

	

}

function getRandomPic() {
	var i = Math.floor(Math.random()*ygp_pics.length);
	return ygp_pics[i];
}