var interval = 6; // delay between rotating images (in seconds)
var random_display = 0; // 0 = no, 1 = yes

interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("images/stationery/preview/large_wed1.gif");
image_list[image_index++] = new imageItem("images/stationery/preview/large_par1.gif");


image_list[image_index++] = new imageItem("images/stationery/preview/large_wed2.gif");
image_list[image_index++] = new imageItem("images/stationery/preview/large_par2.gif");


image_list[image_index++] = new imageItem("images/stationery/preview/large_wed3.gif");
image_list[image_index++] = new imageItem("images/stationery/preview/large_par3.gif");



var number_of_image = image_list.length;
var current_index = -1;

if (document.images) {
	preload_image_object = new Image();

	for(var i=0; i<=2; i++){
         preload_image_object.src = image_list[i];
	}
}
    
  
  

function rotateImage(rImg1, rImg2) {
	for ( var i=1; i<3; i++){
		var new_image = getNextImage();
		document['rImg'+i].src = new_image;
		var recur_call = "rotateImage('rImg"+i+"')";
	}
	setTimeout(recur_call, interval);
}



function getNextImage() {
	
	if (random_display) {
		image_index = generate(0, number_of_image-1);
	} else {
		// step through the list one by one
		if( current_index < number_of_image-1 ){
			current_index++;
		}else{
			current_index = 0;
		}
		image_index = current_index;
	}
	
	var new_image = get_ImageItemLocation(image_list[image_index]);
	return(new_image);
}



function get_ImageItemLocation(imageObj) {
	return(imageObj.image_item.src)
}


function imageItem(image_location) {
	this.image_item = new Image();
	this.image_item.src = image_location;
}


function generate(x, y) {
	var range = y - x + 1;
	return Math.floor(Math.random() * range) + x;
}