var $weetjes;

$(document).ready(
                    function()
                    {
                        // load global $weetjes struct
                        $weetjes = loadWeetjes();

                        // overwrite the mission-statement with the first weetje in X seconds
                        var $timerID = setTimeout( "setWeetje()", $weetjes.timeout )
                        $weetjes.timerIDs.push( $timerID ); // keep timer-id

                        // show next weetje when clicked on arrow-button
                        $('img#arrow-next-weetje').click(
                                                            function()
                                                            {
                                                                setWeetje();
                                                            }
                                                         );
                    }
                 );

function setWeetje()
{
    // no element or only one -> do nothing
    if ( $weetjes.list.length <= 1 ){
        return;
    }

    // get title, link
    var $title = $weetjes.list[$weetjes.i].title;
    var $link  = $weetjes.list[$weetjes.i].link;

    // add link (if set)
    if ( $link != null && $link != '' ){
        $title = '<a href="'+$link+'" id="weetje-link">'+$title+'</a>';
    }

    // set text
    $('div#weetje').html( $title );

    // take next weetje
    $weetjes.i = (($weetjes.i+1)<$weetjes.list.length) ? $weetjes.i+1 : 0;

    // timer handling
    {
        // kill existing timers
        for ( var $i = 0; $i < $weetjes.timerIDs.length; $i++ ){
            clearTimeout( $weetjes.timerIDs[$i] );
        }
        $weetjes.timeoudIDs = [];

        // set new timer
        var $timerID = setTimeout( "setWeetje()", $weetjes.timeout ); // 6 sec

        // keep timer id for later killing
        $weetjes.timerIDs.push( $timerID );
    }
}

function loadWeetjes()
{
    return {
                list       :
                                [{"title":"Un monde digne de tous les enfants et respectueux de leurs droits.",
                                	"link":null
                                	},{
                                		"title":"1 milliard d'enfants n'ont pas acc&egrave;s &agrave; des services essentiels en mati&egrave;re de survie et de d&eacute;veloppement.",
                                		"link":null
                                	},{
                                		"title":"1,6 milliard de personnes ont eu acc&egrave;s &agrave; l'eau potable entre 1990 et 2006.",
                                		"link":null
                                	},{
                                		"title":"La Convention relative aux droits de l'enfant a 20 ans. ",
                                		"link":null
                                	},{
                                		"title":"Saviez-vous que l'UNICEF est le plus grand fournisseur de vaccins dans les pays en d&eacute;veloppement.",
                                		"link":null
                                	}]                             ,
                i          :    1,  // localized index, start from the second weetje (first is shwon default)
                timeout    : 6000,  // msec, i.e. 6 sec
                timerIDs   : []
           };
}