function updateGallery(el, image){
    if(el.className == 'selected'){
        el.className =  '';
        deleteFromGallery(image);
    } else {
        el.className = 'selected';
        addToGallery(image);
    }
    //ils = document.getElementById('imagelist_selected');
    //n = ils.options.length;
    //alert(n);
}

function addToGallery(image){
    ils = document.getElementById('imagelist_selected');
    n = ils.options.length;
    ils.options[n] = new Option(image, image);
    ils.options[n].selected = true;
}


function deleteFromGallery(image){
    ils = document.getElementById('imagelist_selected');
    n = ils.options.length;
    for(i=0;i<n;i++){
        if(ils.options[i].value == image){
            ils.options[i] = null;
        }
    }
}