function toggleTools(obj)
  {
		if(obj == "mbr_tools_off")
		{
			document.getElementById("mbr_tools_off").style.display="block";
			document.getElementById("mbr_tools_on").style.display="none";							
		}
		else if(obj == "mbr_tools_on")
		{
			document.getElementById("mbr_tools_off").style.display="none";
			document.getElementById("mbr_tools_on").style.display="block";							
		}
	}