// JavaScript Document

var galptr = 0;

function previewpic(pic,n) {
	var frm = document.getElementById('preview');

	frm.src = pic;
	galptr  = n;
}

function upd8ptr() {
	document.getElementById('ptr').innerHTML = galptr+1;
}

function galnext() {
	var tmb;
	
	var cnt = document.getElementById('galcount').value;
	if(galptr+1 < cnt) { galptr++; }
	
	tmb = document.getElementById('thumb'+galptr).src;

	previewpic(tmb,galptr);
	upd8ptr();
}


function galprev() {
	var tmb;
	
	if(galptr-1 < 0) { 
		galptr = 0;
	} else {
		galptr--;
	}
	
	tmb = document.getElementById('thumb'+galptr).src;
	
	previewpic(tmb,galptr);
	upd8ptr();
}