var preloadedImages = new Array();
var preloadedImages_keys = new Array();

function preloadImages(locationFolder) {
    if(document.images) {
            var i, args = preloadImages.arguments; 
            for(i=1; i<args.length; i++) {
                preloadedImages[args[i]] = new Image(); 
                preloadedImages[args[i]].src   = locationFolder + args[i];

                preloadedImages_keys[i] = args[i]; 
            }
    }
}


function rollOn(imageName) {
     if(document.images)
     document.images[imageName].src = preloadedImages[imageName + "_over.gif"].src;
}

function rollOff(imageName) {
    if(document.images)
     document.images[imageName].src = preloadedImages[imageName + "_normal.gif"].src;
}


function rollOnOffDynamic(imageName, newImageName) {
     if(document.images)
        document.images[imageName].src = preloadedImages[newImageName].src;
}	


function ClickUp(pos)
{
    var obj1 = document.getElementById('Llink1');
    var obj2 = document.getElementById('Llink2');
    var obj3 = document.getElementById('Llink3');
    
    if (current_index>1)
    {
        current_index=current_index-1;
        document.images['leftGallery1'].src = preloadedImages[preloadedImages_keys[current_index]].src;
        document.images['leftGallery2'].src = preloadedImages[preloadedImages_keys[current_index+1]].src;
        document.images['leftGallery3'].src = preloadedImages[preloadedImages_keys[current_index+2]].src;
        obj1.innerHTML = preloadedName[current_index];
        obj2.innerHTML = preloadedName[current_index+1];
        obj3.innerHTML = preloadedName[current_index+2];
        
        obj1.href = preloadedHref[current_index];
        obj2.href = preloadedHref[current_index+1];
        obj3.href = preloadedHref[current_index+2];
    }
}

function ClickDown(pos)
{
    var obj1 = document.getElementById('Llink1');
    var obj2 = document.getElementById('Llink2');
    var obj3 = document.getElementById('Llink3');
    
    if ((all_items-show_items) > (current_index-1))
    {
        current_index = current_index+1;
        document.images['leftGallery1'].src = preloadedImages[preloadedImages_keys[current_index]].src;
        document.images['leftGallery2'].src = preloadedImages[preloadedImages_keys[current_index+1]].src;
        document.images['leftGallery3'].src = preloadedImages[preloadedImages_keys[current_index+2]].src;
        obj1.innerHTML = preloadedName[current_index];
        obj2.innerHTML = preloadedName[current_index+1];
        obj3.innerHTML = preloadedName[current_index+2];
        
        obj1.href = preloadedHref[current_index];
        obj2.href = preloadedHref[current_index+1];
        obj3.href = preloadedHref[current_index+2];
    }
}