var old = 0;
function switchPhotos(gallery) {
	old = parseInt(old);

	if (gallery == 'next') {
		gallery = old + 1;
	} else if (gallery == 'prev') {
		gallery = old - 1;
	}
	
	//modify prev, next links
	if (gallery == total) {
		document.getElementById('navNext').style.display = 'none';
	} else {
		document.getElementById('navNext').style.display = 'inline';
	}
	if (gallery == 0) {
		document.getElementById('navPrev').style.display = 'none';
	} else {
		document.getElementById('navPrev').style.display = 'inline';
	}
	//modify number links, if more then 5 pages, on each page check if within 3 then display
	if (total > 4) {
		for (i=0;i<total+1;i++) {
			document.getElementById('galleryMore_'+i).style.display = 'none';
			for (j=gallery-3;j<gallery+4;j++){
				if (i == j){
					document.getElementById('galleryMore_'+i).style.display = 'inline';
				}
			}
		}
	}
	//modify actual imgs
	document.getElementById('gallery_'+old).style.display = 'none';
	document.getElementById('galleryMore_'+old).style.color = 'black';

	document.getElementById('gallery_'+gallery).style.display = 'block';
	document.getElementById('galleryMore_'+gallery).style.color = 'red';
	old = gallery;

}