var slide_index;
    
function slide_back(folder)
{
    if ( slide_index == undefined )
    {
        resetSlideIndex();
    }
    
    if ( slide_index > 1 )
    {
        slide_index--;
        document.getElementById("slideshow").src = folder + "/0" + slide_index + ".jpg";
    }
}

function slide_next(folder)
{
    if ( slide_index == undefined )
    {
        resetSlideIndex();
    }
    
    if ( slide_index < 7 )
    {
        slide_index++;
        document.getElementById("slideshow").src = folder + "/0" + slide_index + ".jpg";
    }
}

function resetSlideIndex()
{
	slide_index = 1;
}