function swap(targetId)
{
  
  
  if (document.getElementById)
  {
  	  
     target = document.getElementById(targetId);
     
     
     if (target.style.display == "none")
     {
     target.style.display = "";
     } 
     else 
     {
     target.style.display = "none";
     }       
  }
}



function swapPhoto(photoSRC, theCaption, theCredit, attr_title) 
{
			if (document.getElementById("caption")) 
			{
			   
							var theImage = document.getElementById("mainPhoto");
							var displayedCaption = document.getElementById("caption");
							var displayedCredit = document.getElementById("credit");
							var imgFolder = "images/";
							
							theImage.setAttribute("src", "images/empty.jpg");
							//theImage.setAttribute("height", "10");
							displayedCaption.firstChild.nodeValue = theCaption;
							displayedCredit.firstChild.nodeValue = theCredit;
							theImage.setAttribute("src", imgFolder+photoSRC);
							//theImage.setAttribute("height", "373");
			    theImage.setAttribute("title", attr_title)
							
			}
}