var banner_num = 0;
var openId="none";
var doCheck = (document.all!=null);
var action= "none";

if (doCheck == false) {
	versionNN = navigator.appVersion;
	if (versionNN.search(/5.0/i) == -1) 
		browser = "NN4";
	else 
		browser = "NN6";
} else {
	var agt = navigator.userAgent.toLowerCase();
	if ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1)) 
		browser = "IE";
	else 
		browser = "OP";
}

function rollOver(name) {
	document.images[name].src = "/gfx/"+name+"_on.gif";
}

function rollOut(name) {
	document.images[name].src = "/gfx/"+name+"_off.gif";
}

function getLayer(id) {        
   	if (browser == "IE" || browser == "OP")
   		return document.all[id];
	else if (browser == "NN4")
		return document.layers[id];
	else
		return document.getElementById(id);
}

function showLayer(id) {        
   var get = getLayer(id)
   if (get != null)          
     	if (browser != "NN4")
         	get.style.visibility = "visible";
      	else
         	get.visibility = "show";
}     
  
function hideLayer(id) {
	var get = getLayer(id)        
	if (get != null)        
      if (browser != "NN4")
         get.style.visibility = "hidden";
      else
         get.visibility = "hide";
}

function drillDown(id,div) {
	if (div == 'yes') {
		idDiv = id+'Div';
		if (openId == 'none') {
			showLayer(idDiv);
			//rollOver(id);
			openId = id;
			openIdDiv = idDiv;
		} else {
			hideLayer(openIdDiv);
			showLayer(idDiv);
			//rollOut(openId);
			//rollOver(id);
			openId = id;
			openIdDiv = idDiv;
		}
	} else {
		if (openId == 'none') {
			rollOver(id);
		} else {
			hideLayer(openIdDiv);
			//rollOut(openId);
			//rollOver(id);
			openId = 'none';
		}
	}
}

function divRollover(name) {
	openId = name;
	openIdDiv = name+"Div";
	showLayer(openIdDiv);
	//rollOver(openId);
}

function divRollout(name) {
	hideLayer(name+'Div');
	//rollOut(name);
	openId = 'none';
	openIdDiv = 'none';
}