var iInterval = 8000;
var iInterval2 = 8000;
var iInterval3 = 8000;
var IntervalID = undefined;
var curr_teaser = 1;

function MM_swapImgRestore() { //v3.0
    var i,x,a=document.MM_sr;
    for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
    var d=document;
    if(d.images){
        if(!d.MM_p) d.MM_p=new Array();
        var i,j=d.MM_p.length,a=MM_preloadImages.arguments;
        for(i=0; i<a.length; i++)
            if (a[i].indexOf("#")!=0){
                d.MM_p[j]=new Image;
                d.MM_p[j++].src=a[i];
            }
    }
}

function MM_findObj(n, d) { //v4.01
    var p,i,x;
    if(!d) d=document;
    if((p=n.indexOf("?"))>0&&parent.frames.length) {
        d=parent.frames[n.substring(p+1)].document;
        n=n.substring(0,p);
    }
    if(!(x=d[n])&&d.all) x=d.all[n];
    for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
    for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
    if(!x && d.getElementById) x=d.getElementById(n);
    return x;
}

function MM_swapImage() { //v3.0
    var i,j=0,x,a=MM_swapImage.arguments;
    document.MM_sr=new Array;
    for(i=0;i<(a.length-2);i+=3)
        if ((x=MM_findObj(a[i]))!=null){
            document.MM_sr[j++]=x;
            if(!x.oSrc) x.oSrc=x.src;
            x.src=a[i+2];
        }
}

function rotate_teaser () {
    var next_teaser = getCookie('LAST_TEASER');
    var n_of_teasers = 4;
    if (next_teaser < n_of_teasers){
        next_teaser ++;
    }
    else {
        next_teaser = 1;
    }
    document.cookie='LAST_TEASER=' + next_teaser;
    var extention = ".gif";
    if (next_teaser == 1){
        extention = ".jpg";
    }
    MM_swapImage('teaser','','images/teaser/main_teaser_cornered_' + next_teaser + extention, 1);
//    if (next_teaser == 2){
//        document.getElementById('trademark_descr').style.display = '';
//    } else {
//        document.getElementById('trademark_descr').style.display = 'none';
//    }
    for(i=1;i<=n_of_teasers;i++) {
        if(i == next_teaser) {
            var newCls = 'teaser-nav-number teaser-nav-number-selected';
        } else {
            var newCls = 'teaser-nav-number';
        }
        document.getElementById('teaser-nav-' + i).className = newCls;
    }
    add_user_map();
    if (IntervalID != undefined){
        changeInterval ( iInterval );
    }
}

function select_teaser(teaser_number){
    document.cookie='LAST_TEASER=' + (teaser_number - 1);
    rotate_teaser ();
}

function teaser_play(){
    if (IntervalID != undefined){
        clearInterval( IntervalID );
        IntervalID = undefined;
        MM_swapImage('teaser-play-btn','','images/teaser/nav_play.png', 1);
        document.getElementById('teaser-play-btn').title = 'Click PLAY to start the slides rolling';
    } else {
        MM_swapImage('teaser-play-btn','','images/teaser/nav_pause.png', 1);
        document.getElementById('teaser-play-btn').title = 'Click PAUSE to stop the slides rolling';
        rotate_teaser ();
        changeInterval ( iInterval );
    }
}

function teaser_next(){
    rotate_teaser ();
}

function getCookie(name) {
    var cookie = " " + document.cookie;
    var search = " " + name + "=";
    var setStr = null;
    var offset = 0;
    var end = 0;
    if (cookie.length > 0) {
        offset = cookie.indexOf(search);
        if (offset != -1) {
            offset += search.length;
            end = cookie.indexOf(";", offset)
            if (end == -1) {
                end = cookie.length;
            }
            setStr = unescape(cookie.substring(offset, end));
        }
    }
    return(setStr);
}

function add_user_map (){
    var oBottomArea = document.createElement("area");
    var oMainArea = document.createElement("area");
    var oTeaser = document.getElementById('teaser');
    var oTeaserMap = document.getElementById('teaser_map');

    aArray = oTeaser.src.split('/');
    strSrc = aArray[aArray.length - 1];
    oTeaser.useMap = '#' + strSrc.substr(0, strSrc.length - 4);
}

function changeInterval ( iInterval ){
    if ( IntervalID != undefined ){
        clearInterval( IntervalID );
    }
    IntervalID = window.setInterval( 'rotate_teaser()', iInterval );
}

window.onload = function (){
    document.cookie='LAST_TEASER=1';
    add_user_map();
    changeInterval ( iInterval );
}