var bts_order = new Array('01','02','03','04','05','06','07','08','09','10','11','12');

var display_number;
var bts_length;

function preloadImages(portfolio_name) {
	len = getLength();
	document.write("<div style=\"display: none;\">");
	for ( var i = 0; i < len; i++ ) {
		document.write("<img src=\"/images/protopro/trends/behindthescenes/BACKSTAGE_" + bts_order[display_number % bts_length] + "_ExLg.jpg\">");
	}
	document.write("</div>");
}

function getLength() {
	return bts_order.length;
}

function goPage(direction) {
	if ( direction == 'home' ) {
		display_number = 0;
	}
	else if ( direction == 'next' ) {
		display_number++;
	}
	else if ( direction == 'prev' ) {
		if ( display_number == 0 )
			display_number = bts_length - 1;
		else
			display_number--;
	}
	refreshPortfolio();
}

function refreshPortfolio() {
	window.document.images['display_photo_img'].src = "/images/protopro/trends/behindthescenes/BACKSTAGE_" + bts_order[display_number % bts_length] + "_ExLg.jpg";
	writeNum();
}

function loadFirst() {
	display_number = 0;
	bts_length = getLength();
}

function writeNum() {
	document.images['display_number'].src = "/images/headers/numbers/" + ((display_number % bts_length) + 1) + ".gif";
	document.images['total_number'].src = "/images/headers/numbers/" + bts_length + ".gif";
}