var which=0;

thumbnaildirectory = "portfolio/thumb/";
fullsizedirectory = "portfolio/full/";

document.images.photoslider1.src=thumbnaildirectory + photos[0];
document.images.photoslider2.src=thumbnaildirectory + photos[1];
document.images.photoslider3.src=thumbnaildirectory + photos[2];
document.images.photoslider4.src=thumbnaildirectory + photos[3];
document.images.fullsize.src=fullsizedirectory + photos[0];

if (which +3 >= photos.length) which = photos.length - 4;
changepictures();

function changepictures() {
document.images.photoslider1.src=thumbnaildirectory + photos[which];
document.images.photoslider2.src=thumbnaildirectory + photos[which + 1];
document.images.photoslider3.src=thumbnaildirectory + photos[which + 2];
document.images.photoslider4.src=thumbnaildirectory + photos[which + 3];
}


function backward(x){
which = which - x;
if (which < 0) which = 0;
changepictures();
}

function forward(x){
which = which + x;
if (which + 3 >= photos.length) which = photos.length - 4;
changepictures();
}

function gotophoto () {
which = document.rotator.description.value -1;
if (which >= photos.length) which = photos.length - 1;
document.images.photoslider.src=thumbnaildirectory + photos[which];

}

function enlarge (x) {
document.images.fullsize.src=fullsizedirectory + photos[which + x];
}