function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments;	for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d){ //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function rollon(obj)
	{
	obj.src='/images/nav_on.gif';
	}

function rolloff(obj)
	{
	obj.src='/images/nav_off.gif';
	}

function rollarrowon(obj, direction)
	{
	eval("obj.src='/images/arrow" + direction + "_on.gif'");
	}

function rollarrowoff(obj, direction)
	{
	eval("obj.src='/images/arrow" + direction + "_off.gif'");
	}

	var wOpen = false;
	var popup = "";
	function OpenWindow(url,width,height,scroll,posn){
		if(wOpen)
			popup.close();	//ensure window opens the correct size
		var topPosn=0;
		var leftPosn=0;
		if (posn == "c") {
			topPosn=(screen.height - height)/2;
			leftPosn=(screen.width - width)/2;
		}
		var windowprops = "location=0,scrollbars=" + scroll + ",menubar=1,toolbar=0," + "resizable=1,left=" + leftPosn + ",top=" + topPosn + ",width=" + width + ",height=" + height;
		popup=window.open(url, "popup", windowprops);
		popup.focus();
		wOpen = true;
	}