var docLayers = null;
	npix = 3
	var names = new Array (npix);
  	names[1] = "menu1"; names[2] = "menu2";   names[3] = "menu3";
	var pixon = new Array(npix);
	var pixoff = new Array(npix);
  	
	for(i=1; i<=npix; i++)
	  {
    	pixon[i] = new Image();
    	pixon[i].src = "/images/menu/"+names[i]+"_on.jpg";
    	pixoff[i] = new Image();
    	pixoff[i].src = "/images/menu/"+names[i]+".jpg";
  	  }
  
function imgon(i)
{
      eval( "document."+names[i]+".src=pixon["+i+"].src" ); 
}

function imgoff(i)
{
     eval( "document."+names[i]+".src=pixoff["+i+"].src" ); 
}  

function popup(whichLayer){

    if(!ismenuLoaded) {return;}

    currentLayer = document.getElementById(whichLayer);

//alert(navigator.appName+' - '+navigator.appVersion);
   if(document.all||isFirefox) { 
    		currentLayer.style.visibility = (currentLayer.style.visibility=="visible") ? "hidden" : "visible";
			if(currentLayer.style.visibility=="visible") {
				imgon(j);
				}
			else {
				imgoff(j);
				}
		}
   else {
    		 if(currentLayer) currentLayer.visibility = (currentLayer.visibility=="show") ? "hide" : "show";
			 if(currentLayer.visibility=="show") {
				imgon(j);
				}
			 else {
				imgoff(j);
				} 
	}

}

function ExtraWindow(file_name,win_name,win_width,win_height) {
	msg = window.open(file_name, win_name,'toolbar=no,directories=no,menubar=no,scrollbars=yes,width='+win_width+',height='+win_height);
}