//check for browser compatibility.

   var AgntUsr=navigator.userAgent.toLowerCase();
	var DomYes=(document.getElementById)?1:0;				// DOM
	var NavYes=(AgntUsr.indexOf('mozilla')!=-1&&AgntUsr.indexOf('compatible')==-1)?1:0;	// Netscape
	var ExpYes=(AgntUsr.indexOf('msie')!=-1)?1:0;				// IExplorer
	var Opr5=(AgntUsr.indexOf('opera 5')!=-1||AgntUsr.indexOf('opera/5')!=-1)?1:0;	// Opera 5
	var DomNav=(DomYes&&NavYes)?1:0;					// Netscape 6 up
 	var DomExp=(DomYes&&ExpYes)?1:0;					// IExplorer 5 up
	var Nav4=(NavYes&&!DomYes&&document.layers)?1:0;			// Netscape 4
	var Exp4=(ExpYes&&!DomYes&&document.all)?1:0;				// IExplorer 4
	var browserOK=((NavYes||ExpYes)&&!Opr5)?1:0;				// Can start

if(!browserOK){
   alert("Your Browser is too old / does not meet the requirements of this page. Please upgrade to Netscape 4 / 6 or ie 4 or greater.");
   window.close();
   }

var stickyLayer = null;
var safety = false;



function showLayer(layerName){

if(!safety){

if(document.all){
   document.all["" + layerName].style.visibility = "visible";
   }
   else if(Nav4){
      //alert("Object.style.linkName = " + layerName);
      document.layers["" + layerName].visibility = "visible";
   }
}
}

function hideLayer(layerName){
if(!safety){
   if(document.all){
      document.all["" + layerName].style.visibility = "hidden";
      }
      else if(Nav4){
         //alert("Object.style.linkName = " + layerName);
         document.layers["" + layerName].visibility = "hidden";
      }
   }
}

function stickLayer(layerName){
if(stickyLayer != null)stickyLayer.visibility = "hidden";
safety = true;
if(Nav4)stickyLayer = document.layers["" + layerName];
   else stickyLayer = document.all["" + layerName].style;

stickyLayer.visibility = "visible";

}

function getpage(urlRef,target,layerName){
	stickLayer(layerName);
	eval("top." + target).document.location = urlRef;
}