var rooms = new Image();
rooms.src = './images/category/rooms.png';

function hover(id, newimg)
{
    var img = new Image();
    img.src = newimg;
    
    document.getElementById(id).src = newimg;

    document.getElementById(id).className += ' active';
}

function hoverout(id, newimg)
{
    document.getElementById(id).src = newimg;
    
    document.getElementById(id).className = document.getElementById(id).className.replace(' active','');
}