var layerBgDivOrgPos = 0;
var layerDivOrgPos = 0;

function showLayer(imgSrcStr)
{
	var layerBgDiv = document.getElementById('layerBgDiv');
	var layerDiv = document.getElementById('layerDiv');
	
	layerBgDivOrgPos = layerBgDiv.style.top;
	layerDivOrgPos = layerDiv.style.top;
	
	var scrollTop = document.body.scrollTop;

  layerBgDiv.style.top = layerBgDivOrgPos + scrollTop;
  layerDiv.style.top = layerDivOrgPos + scrollTop;

  layerBgDiv.style.visibility = 'visible';
  layerDiv.style.visibility = 'visible';
  
  document.popupImg.src = imgSrcStr;
}

function hideLayer()
{
	var layerBgDiv = document.getElementById('layerBgDiv');
	var layerDiv = document.getElementById('layerDiv');

  layerBgDiv.style.visibility = 'hidden';
  layerDiv.style.visibility = 'hidden';

  layerBgDiv.style.top = layerBgDivOrgPos;
  layerDiv.style.top = layerDivOrgPos;
  
  document.popupImg.src = '/images/logo.jpg';
}