plus = new Image(); plus.src = "img/icn.plus.gif";
minus = new Image(); minus.src = "img/icn.minus.gif";

function plus_minus(nr, img){
	if (document.layers)
	{
		if (document.layers[nr].display == 'none')
		{
		document.layers[nr].display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.layers[nr].display = 'none';
		document.images[img].src = plus.src;
		}
	}
	else if (document.all)
	{
		if (document.all[nr].style.display == 'none')
		{
		document.all[nr].style.display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.all[nr].style.display = 'none';
		document.images[img].src = plus.src;
		}
	}
	else if (document.getElementById)
	{
		if (document.all[nr].style.display == 'none')
		{
		document.getElementById(nr).style.display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.getElementById(nr).style.display = 'none';
		document.images[img].src = plus.src;
		}
	}
}

function winH() {
   if (window.innerHeight)
      /* NN4 a kompatibilní prohlížeče */
      return window.innerHeight;
   else if
   (document.documentElement &&
   document.documentElement.clientHeight)
      /* MSIE6 v std. režimu - Opera a Mozilla
      již uspěly s window.innerHeight */
      return document.documentElement.clientHeight;
   else if
   (document.body && document.body.clientHeight)
      /* starší MSIE + MSIE6 v quirk režimu */
      return document.body.clientHeight;
   else
      return null;
}

function initGallery(container, imgBox, idx){
	switchGallery(container);
	showImage(container, imgBox, idx);
}

function showImage(container, imgBox, idx){
	$('#'+imgBox).attr('src', glrImages[idx]);
	$('#'+imgBox).attr('alt', glrImagesDescriptions[idx]);
	curImgIdx = idx;
	glrNavbar(container, imgBox, idx);
	var h = $('#'+container+' img').height();
	$('#imgDescription').text(glrImagesDescriptions[idx]);
}

function glrNavbar(container, imgBox, idx){
	var navbarContainer = 'glrNavbar';
	var prevLink = '';
	var nextLink = '';
	var closeLink = "<div id='top'><a href='javascript:switchGallery(\"glrContent\");'>zavřít</a></div>";
	if (curImgIdx > 0) {
		prevLink = "<a href=\"javascript:showImage('"+container+"', '"+imgBox+"', "+(idx-1)+");\" title=\"&lt;&lt;&lt;\" class=\"prev\">&nbsp;</a>";
		}
	if (curImgIdx < (glrImages.length - 1)) {
		nextLink = "<a href=\"javascript:showImage('"+container+"', '"+imgBox+"', "+(idx+1)+");\" title=\"&gt;&gt;&gt;\" class=\"next\">&nbsp;</a>";
		}
	if (document.layers)
	{
		document.layers[navbarContainer].innerHTML = prevLink + closeLink + nextLink;
	}
	else if (document.all)
	{
		document.all[navbarContainer].innerHTML = prevLink + closeLink+ nextLink;
	}
	else if (document.getElementById)
	{
		document.getElementById(navbarContainer).innerHTML = prevLink + closeLink + nextLink;
	}
}

function switchGallery(container){
	$('#'+container).toggle('slow');
}


function plus_minus(nr, img){
	if (document.layers)
	{
		if (document.layers[nr].display == 'none')
		{
		document.layers[nr].display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.layers[nr].display = 'none';
		document.images[img].src = plus.src;
		}
	}
	else if (document.all)
	{
		if (document.all[nr].style.display == 'none')
		{
		document.all[nr].style.display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.all[nr].style.display = 'none';
		document.images[img].src = plus.src;
		}
	}
	else if (document.getElementById)
	{
		if (document.all[nr].style.display == 'none')
		{
		document.getElementById(nr).style.display = 'block';
		document.images[img].src = minus.src;
		}
			else
		{
		document.getElementById(nr).style.display = 'none';
		document.images[img].src = plus.src;
		}
	}
}