var active = 1;

// next picture in gallery
function nextPic() {

	parseInt(active++);

	if (active > last) {
		active = 1;
	} 
	document.getElementById("active").src = picArray[active];
	document.getElementById("gallery_comment").innerHTML = textArray[active];
}

// previous picture in gallery
function prevPic() {

	parseInt(active--);

	if(active < 1) {
		active = last;
	}
	document.getElementById("active").src = picArray[active];
	document.getElementById("gallery_comment").innerHTML = textArray[active];
}


function firstPic() {
	active = 1;
	document.getElementById("active").src = picArray[active];
	document.getElementById("gallery_comment").innerHTML = textArray[active];
}

function lastPic() {
	active = last;
	document.getElementById("active").src = picArray[active];
	document.getElementById("gallery_comment").innerHTML = textArray[active];
}

// show picture 
function showPic(picNr) {
	
	document.getElementById("active").src = picArray[picNr];
	document.getElementById("gallery_comment").innerHTML = textArray[picNr];
}