var lastId = 0;
var intervalId = 0;
var inUse = new Array(5);

function rotator() {
	
	clearInterval(intervalId);
	
	do {
		var imageNum = Math.floor(((Math.random() * 4) + 1));
	} while (imageNum == lastId);
	
	if (imageNum == 1) {
		var imageName = "one";
	} else if (imageNum == 2) {
		var imageName = "two";
	} else if (imageNum == 3) {
		var imageName = "three";
	} else if (imageNum == 4) {
		var imageName = "four";
	}
	
	do {
		if (imageNum == 3) {
			inUse[3] = Math.floor(((Math.random() * 4) + 1));
			var image = "resources/w_" + inUse[3] + ".jpg";
		} else {
			inUse[imageNum] = Math.floor(((Math.random() * 9) + 1));
			var image = "resources/h_" + inUse[imageNum] + ".jpg";
		}
	} while (inUse[1] == inUse[2] || inUse[2] == inUse[4] || inUse[1] == inUse[4] || image == $("div#home img#" + imageName).attr("src"));
  
  $("div#home img#" + imageName).fadeOut("slow", function() {
	  $("div#home img#" + imageName).attr("src", image);
	  $("div#home img#" + imageName).fadeIn("slow");
	});

	lastId = imageNum;
	intervalId = window.setInterval("rotator()", 6000); 
	
};

$(document).ready(function() {
	
	inUse[1] = 1;
	inUse[2] = 2;
	inUse[4] = 3;
	
	for (var i = 1; i < 5; i++) {
		do {
			if (i == 3) {
				inUse[i] = Math.floor(((Math.random() * 4) + 1));
				$("div#home img#three").attr("src",  "resources/w_" + inUse[i] + ".jpg");
			} else {
				inUse[i] = Math.floor(((Math.random() * 9) + 1));
				if (i == 1) {
					var imgName = "one";
				} else if (i == 2) {
					var imgName = "two";
				} else if (i == 4) {
					var imgName = "four";
				}
				$("div#home img#" + imgName).attr("src",  "resources/h_" + inUse[i] + ".jpg");
			}
		} while (inUse[1] == inUse[2] || inUse[2] == inUse[4] || inUse[1] == inUse[4]);
	}

	homeArray = new Array();
	homeArray[1] = new Image();
	homeArray[1].src = "resources/h_1.jpg";
	homeArray[2] = new Image();
	homeArray[2].src = "resources/h_2.jpg";
	homeArray[3] = new Image();
	homeArray[3].src = "resources/h_3.jpg";
	homeArray[4] = new Image();
	homeArray[4].src = "resources/h_4.jpg";
	homeArray[5] = new Image();
	homeArray[5].src = "resources/h_5.jpg";
	homeArray[6] = new Image();
	homeArray[6].src = "resources/h_6.jpg";
	homeArray[7] = new Image();
	homeArray[7].src = "resources/h_7.jpg";
	homeArray[8] = new Image();
	homeArray[8].src = "resources/h_8.jpg";
	homeArray[9] = new Image();
	homeArray[9].src = "resources/h_9.jpg";
	
	homeArray[10] = new Image();
	homeArray[10].src = "resources/w_1.jpg";
	homeArray[11] = new Image();
	homeArray[11].src = "resources/w_2.jpg";
	homeArray[12] = new Image();
	homeArray[12].src = "resources/w_3.jpg";
	homeArray[13] = new Image();
	homeArray[13].src = "resources/w_4.jpg";
});

$(window).load(function () {
	intervalId = window.setInterval("rotator()", 3000); 
});