function SymError()
{
  return true;
}

window.onerror = SymError;

var SymRealWinOpen = window.open;

function SymWinOpen(url, name, attributes)
{
  return (new Object());
}

window.open = SymWinOpen;


		var visas = "backbox1";
		var sidovisas = "backbox21";
		function changeContent(thisobj, sidoobj)
		{
			getObj(visas).style.visibility = "hidden";  
			getObj(thisobj).style.visibility = "visible";
			visas = thisobj; 
			
			getObj(sidovisas).style.visibility = "hidden";  
			getObj(sidoobj).style.visibility = "visible";
			sidovisas = sidoobj;
		}


		function getObj(elementID)
		{
			if (typeof elementID == "string") {
			return document.getElementById(elementID);
			}
			else
			{
			return elementID;
			}
		}


		function changeImage(bildid,nybild) 	
		{
			bildid.src=nybild;
		}


		function show(elementID) 
		{
		document.getElementById(elementID).style.visibility='visible';
		}


		function hide(elementID) 
		{
		document.getElementById(elementID).style.visibility='hidden';
		}