function unhide(id)
  {
         document.getElementById(id).style.display = "";
  }

 function hide(id)
  {
         document.getElementById(id).style.display = "none";
  }

function switchVisible(vis,hid)
{
	document.getElementById(vis).style.display = "";
	//document.getElementById(vis + '_plus').style.visibility = "hidden";
	for (i=0;i<hid.length;i++) {
		document.getElementById(hid[i]).style.display = "none";
		//document.getElementById(hid[i] + '_plus').style.visibility = "visible";
	}
}