function swap(id,isOn) { 
	if (isOn == "on") return;
	state = (document["n" + id].src.indexOf("_on") == -1) ? "_on" : "_off" ; 
	document["n" + id].src = "img/nav/bt_" + id  +  state  + ".gif" 
	} 
	
function swapD(id,isOn) { 
	//if (isOn == "on") return;
	state = (document["n" + id].src.indexOf("_on") == -1) ? "_on" : "_off" ;
	//alert (state);
	document["n" + id].src = "" + id  +  state  + ".gif"
	} 
	
// Popup 
function popWin(url,w,h,n) { var newWin = window.open(url,n,'toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=0,resizable=1,width=' + w + ',height=' + h + ',top=20,left=20'); newWin.focus(); }