var pr_index = 0;
var pr_data;
var pr_images = new Array();

function photorama( data ) {
	pr_data = data;
	if( pr_data && pr_data.length && pr_data.length > 1 ) {
		// set that first photo is loaded
		pr_images[0] = true;
		// start photorama
		pr_next();
	}
}

function pr_next() {
	pr_index = pr_data[pr_index+1] ? pr_index+1 : 0;
	if( ! pr_images[pr_index] ) {
		var img = new Image();
		img.src = '/files/'+pr_data[pr_index];
		pr_images[pr_index] = true;
	}
	window.setTimeout( pr_next_hide , 3000 );
}

function pr_next_hide() {
	$('#ws_photorama').fadeOut( 2000 , pr_next_show );
}

function pr_next_show() {
	$('#ws_photorama').attr( {src:'/files/'+pr_data[pr_index]} );
	$('#ws_photorama').fadeIn( 2000 , pr_next );
}