var aryImages = new Array(2);
var iNavCnt = 15;
var iCnt = 0;

for (var k=0;k<iNavCnt;k++)
	aryImages[iCnt++] = new Array("/images/nav/menu_" + (k+1) + ".gif","/images/nav/menu_" + (k+1) + "_swap.gif");

for (i=0;i<aryImages.length;i++) 
{
	var preload = new Image();
	for (var j=0;j<2;j++)
	 	preload.src = aryImages[i][j];
}
 
function swap(navIndex,imgIndex) 
{
   document['imgNavSwap' + navIndex].src = aryImages[(navIndex-1)][imgIndex];
}

function toggleMenu(sMenu,iOpt)
{
	var oMenu = getObj(sMenu);
	
	if (iOpt == 0)
		var sOpt = "hidden";
	else
		var sOpt = "visible";
		
	oMenu.visibility = sOpt;
}

function getObj(name)
{
  if (document.getElementById)
    return document.getElementById(name).style;
  else if (document.all)
    return document.all[name].style;
  else if (document.layers)
    return document.layers[name];
  else 
	  return false;
}