function showArrows(hotelID) {
    $('arrow_left_'+hotelID).style.display = 'block';
    $('arrow_right_'+hotelID).style.display = 'block';
} 
function hideArrows(hotelID) {
    $('arrow_left_'+hotelID).style.display = 'none';
    $('arrow_right_'+hotelID).style.display = 'none';
}    


function changepic(hotelID, currentpic, lastpic) {
  var i = 0;  
  $$("img.hotemorepic_"+hotelID+"x").each(function(currimg) {
    if (i == lastpic) {
        currimg.set('opacity', 1);        
        currimg.tween('opacity', 0);
        currimg.zIndex = 1;                
    } else {
        if (i == currentpic) {
            currimg.set('opacity', 0);
            currimg.tween('opacity', 1);
            currimg.zIndex = 2;        
            currimg.style.visibility = 'visible';
        }    
    }
    i++;
 }); 
}