function hideDivs(exempt)
  {
    if (!document.getElementsByTagName) return null;
    if (!exempt) exempt = "";
    var divs = document.getElementsByTagName("div");
    for(var i=0; i < divs.length; i++)
    {
      var div = divs[i];
      var id = div.id;
      if ((id == "p1") | (id == "p2")  | (id == "p3") | (id == "p4") | (id == "p5") | (id == "p6") && (id != exempt))
      {
        div.className= "hidden";
      }
    }
  }
  
 function show(what)
  {
    if (!document.getElementById) return null;
	activeDIV = document.getElementById(what);
	if (!activeDIV.className) {
	activeDIV.className= "hidden";

	}
	else {
    var showWhat = document.getElementById(what);
    showWhat.className = "";

    hideDivs(what);

	}
  }