function navo(o){
	var img = o.getElementsByTagName('IMG')[0]
	var src = img.src;
	var off = src.replace('_on.gif', '.gif');
	var on = off.replace('.gif', '_on.gif');
	img.src = on;
}

function navu(o){
	var img = o.getElementsByTagName('IMG')[0]
	var src = img.src;
	var off = src.replace('_on.gif', '.gif');
	var on = src.replace('.gif', '_on.gif');
	img.src = off;
}

function toggle(o)
{
	var box = 'div_'+o;
	var img = 'img_'+o;
	var oBox = document.getElementById(box);

	if( oBox == null ) return;

	var current = oBox.style.display;
	
	//alert( current );
	
	if( current == 'none' ){
		oBox.style.display = 'block';
		eval("document."+img).src = "/images/nb/arrow_down.gif";
	}
	if( current == 'block' ){
		oBox.style.display = 'none';
		eval("document."+img).src = "/images/nb/arrow.gif";
	}
	 
}

function openWindow(url, winWidth, winHeight, opts){
	var posLeft = (screen.width - winWidth) / 2;
	var posTop = (screen.height - winHeight) / 2;
	var wtf = "location=no,width="+winWidth+",height="+winHeight+",left="+posLeft+",top="+posTop+opts;
	var popped = window.open(url,"LBSPOP",wtf);
	popped.focus();
}