function getQueryString(qArray) {
    var temp = "";
    $.each(qArray, function(index, item) {
        if (item != undefined) {
            if (temp != "") {
                temp += ':';
            }
            temp += item;
        }
    });      
    return temp;        
}
function toggleBlock(id, element) {
    if (strstr(element.innerHTML, 'sluiten')) {
        element.innerHTML = 'onderdeel tonen <img src="/img/open.gif" />';
    }
    else {
        element.innerHTML = 'onderdeel sluiten <img src="/img/close.gif" />';
    }
    $('#block' + id).slideToggle();
}

function strstr( haystack, needle, bool ) {
    var pos = 0;
    haystack += '';
    pos = haystack.indexOf( needle );
    if( pos == -1 ){
        return false;
    } else{
        if( bool ){
            return haystack.substr( 0, pos );
        } else{
            return haystack.slice( pos );
        }
    }
}