function checkPrevNext(index)
{
    if($('item_'+(index-1)) == undefined)
    {
        $('previmg').hide()
    }
    else
    {
        $('previmg').show()
        var car_index = index+1
        if((car_index-1)%9 == 0)
            $('previmg').onclick = function() {
                $('item_'+(index-1)).simulate('click');
                $('carousel_'+(car_index-9)).simulate('click');
                return false;
            };
        else
            $('previmg').onclick = function() {
                $('item_'+(index-1)).simulate('click');
                
                return false;
            };
    }
    if($('item_'+(index+1))== undefined)
    {
        $('nextimg').hide()
    }
    else
    {
        $('nextimg').show()
        if((car_index)%9 == 0)
            $('nextimg').onclick = function() {
                $('item_'+(index+1)).simulate('click');
                $('carousel_'+(car_index+1)).simulate('click');
                return false;
            };
        else
            $('nextimg').onclick = function() {
                $('item_'+(index+1)).simulate('click');
                return false;
            };
    }
}

function selectFirstItem()
{
    $('item_0').simulate("click")
}

function itemSelect(index)
{
    var selected_items = $$('li.gallery_item_selected');
    for(var i=0;i<selected_items.length;i++)
    {
        selected_items[i].removeClassName('gallery_item_selected')
        selected_items[i].addClassName('gallery_items')
    }
    $('item_'+index).up().removeClassName('gallery_items')
    $('item_'+index).up().addClassName('gallery_item_selected')
    Effect.BlindDown('gallery_item',{
        duration:'0.5'
    })
}