/*
 * Juan Miguel Rodríguez Cerón
 * Framboise! Comunicación Digital
 *
 * Proyecto: Web Corporativa Proinco
 * 06/04/2010
 */
var clk;
var NUM_IMAGES = 13;
var base_url = 'http://www.proinco.es/';
//var base_url = 'http://www.framboise.es/INTERNO/proinco2/';

$(document).ready(function(){

    //load background images asincronously
    load_background();
    
});

function load_background(){

    for(var i=2; i<=NUM_IMAGES; i++){
        var newImg = '<div class="background" id="bg_'+ i +'" style="display:none"><img src="'+ base_url +'images/reel/img'+ i +'.jpg" alt=""/></div>';
        $('#bg_images').append(newImg);
    }

    //when the load finish, begin the loop
    background_loop();
}

function background_loop()
{
    clk = setInterval( "changeBackground()", 5000 );
}

function changeBackground()
{
    var current = $('.background:visible').attr('id');
    current = current.split('_');
    current = current[1];

    var next = (parseInt(current)+1);
    if( next == NUM_IMAGES+1 ) next = 1;

    $('#bg_'+next).css('z-index','-2');
    $('#bg_'+current).css('z-index','-1');
    $('#bg_'+next).show();
    $('#bg_'+current).fadeOut();
    
}