// Developed by Ross Logic Canberra
// Optimised for multi-browsers.

var nn4 = (document.layers) ? true : false ;
var ie = (document.all) ? true : false ;
var dom = (document.getElementById && !document.all) ? true : false ;

function browser(id){
  if(nn4) {
  path = document.layers[id]
  }
  else if(ie) {
  path = document.all[id]
  } 
  else {
  path = document.getElementById(id)
  }
return path  //return the path to the css layer depending on which browser is looking at the page
}


function toggleLayer(showID, hideID) {
 showLayer(showID);
 hideLayer(hideID);
}

function showLayer(id) {

layer = browser(id)
   if(nn4){
	layer.visibility = "visible";
	layer.display = "block";
   }
   else{
	layer.style.visibility = "visible";
	layer.style.display = "block";
   }
} 

function hideLayer(id) {

layer = browser(id)
   if(nn4){
	layer.visibility = "hidden";
	layer.display = "none";
   }
   else{
	layer.style.visibility = "hidden";
    layer.style.display = "none";
   }
}