function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-1); i+=2) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+1];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
    
}

function showdiv(demodiv) 
{ 

           document.getElementById("an1").style.display = "none";
		   document.getElementById("an2").style.display = "none";
		   document.getElementById("an3").style.display = "none";
		   document.getElementById("an4").style.display = "none";
		   document.getElementById("an5").style.display = "none";
		   document.getElementById("an6").style.display = "none";
		   document.getElementById("an7").style.display = "none";
		   document.getElementById("an8").style.display = "none";
		   document.getElementById("an9").style.display = "none";
		   

          var obj = document.getElementById(demodiv); 
        obj.style.display = "block"; 
    
} 

var state = 'none';

function showhide(layer_ref) {

if (state == 'block') {
state = 'none';
}
else {
state = 'none';
}
if (document.all) { //IS IE 4 or 5 (or 6 beta)
eval( "document.all." + layer_ref + ".style.display = state");
}
if (document.layers) { //IS NETSCAPE 4 or below
document.layers[layer_ref].display = state;
}
if (document.getElementById && !document.all) {
hza = document.getElementById(layer_ref);
hza.style.display = state;
}
}