function changePic() {
    var pics = new Array(
        {id: '1' , path: 'square75x75_', nbPics: 8},
        {id: '2' , path: 'square155x75_', nbPics: 8},
        {id: '3' , path: 'square75x75_', nbPics: 8},
        {id: '4' , path: 'square235x155_', nbPics: 8}
    );
    speed = 1200;
    var n = Math.floor(Math.random()*4);
    var n2 = Math.floor(Math.random()*(pics[n]['nbPics']+1));
    if (n2==0) {
        $('#picDyn'+pics[n]['id']+' img').fadeOut(speed, function(){
            //$(this).html(' ');
        });
    }
    else {
        if ($('#picDyn'+pics[n]['id']+' img').length) {
            $('#picDyn'+pics[n]['id']+' img').fadeOut(speed, function(){
                $(this).remove();
            });
            $('<img alt="" src="/sites/all/themes/gerimmo/images/headPics/'+pics[n]['path']+n2+'.jpg" />')
                    .hide()
                    .load(function(){
                        $(this)
                            .appendTo('#picDyn'+pics[n]['id'])
                            .fadeIn(speed);
                    });
        }
        else {
            $('#picDyn'+pics[n]['id']+' img').remove();
            $('<img alt="" src="/sites/all/themes/gerimmo/images/headPics/'+pics[n]['path']+n2+'.jpg" />')
                .hide()
                .load(function(){
                        $(this)
                            .appendTo('#picDyn'+pics[n]['id'])
                            .fadeIn(speed);
                });
        }
    }
}
$(document).ready(function() {
    window.setInterval("changePic()", 3000);
});