var foto = 0;
var galeria = 0;

var URL = document.location.href;
var query = URL.substring((URL.indexOf('?'))+1);

function getParameter(paramName) {
	var currentUrl = window.location.search
	var strBegin = currentUrl.indexOf(paramName) + (paramName.length+1)
	var strEnd = currentUrl.indexOf("&",strBegin)

	if (strEnd==-1)
		strEnd = currentUrl.length

	return currentUrl.substring(strBegin,strEnd)
}

if (newfoto = getParameter('foto')) {
  foto = newfoto;
}

if (newGal = getParameter('galeria')) {
  galeria = newGal;
}

function showPicture() {
  document.writeln('<img src="fotos/'+galeriasDir[galeria]+'/'+
                   foto+'.jpg" border="0" />');
}

function showPictureTitle() {
  pict = galerias[galeria][foto];
  total = galerias[galeria].length;
  num = foto;
  num++;
  document.writeln(pict + ' ('+num+'/'+total+')');
}

function showLeftArrow() {
  prev = foto;
  prev--;
  if ( prev < 0 ) {
     return;
  }
  document.writeln('<a href="fotos.html?galeria='+galeria+'&foto='+prev+'" ><img src="img/fi.gif" border="0" width="30" height="30" /></a>');
}

function showRightArrow() {
  prox = foto;
  prox++;
  if (prox >= galerias[galeria].length) {
      return;
  }
  document.writeln('<a href="fotos.html?galeria='+galeria+'&foto='+prox+'" ><img src="img/fd.gif" border="0" width="30" height="30" /></a>');

}

function showTitle() {
  document.writeln(galeriasTitle[galeria]);
}