var current_picture = 0;
var pictures_arr = new Array();
var interval = '';

function proces_onload(){
    toggle_pictures(current_picture);
}


function toggle_pictures(position){
    if(position < 0){ //back je kliknut
        position = pictures_arr.length - 1;
    }
    else if(position >= pictures_arr.length){
        position = 0;
    }
    current_picture = position;
    for(var i=0; i<pictures_arr.length;i++){
        if(i!=current_picture){
            document.getElementById(pictures_arr[i]).style.display = 'none';
        }
    }
    document.getElementById(pictures_arr[current_picture]).style.display = '';
    var speed = Math.round(5);
    var timer = 0;
    for(i = 0; i <= 100; i++)
    {
        //setTimeout("change_opacity(" + i + ",'" + pictures_arr[current_picture] + "')",(timer * speed));
        timer++;
    }
    if(interval == '' || interval == undefined){
        set_interval();
    }
}

function clear_interval(){
    interval = clearInterval(interval);
}

function set_interval(){
    interval = setInterval('toggle_pictures(current_picture+1)', 3000);
}
/*
function change_opacity(opacity) {
    document.getElementById(pictures_arr[current_picture]).style.opacity = (opacity / 100);
    document.getElementById(pictures_arr[current_picture]).style.MozOpacity = (opacity / 100);
    document.getElementById(pictures_arr[current_picture]).style.KhtmlOpacity = (opacity / 100);
    document.getElementById(pictures_arr[current_picture]).style.filter = "alpha(opacity=" + opacity + ")";
}
*/