var popUpWin=0;
function popUpWindow(URLStr, width, height, x, y)
{
  if(popUpWin)
  {
    if(!popUpWin.closed) popUpWin.close();
  }
  popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=1,resizable=1,copyhistory=yes,width='+width+',height='+height+',left='+x+', top='+y+'');
}  

if (document.images)	{
var imglist = new Array('home','packages','trail','links','registration');
var imgs = new Array(); var count;
	for (count=0; count<imglist.length; count++)
	{imgs[count]=new Image(); imgs[count].src="i/nav/" + imglist[count] + "-on.gif";}
      }
// Flip it on
function roll(imgName) {
	if (document.images) { document[imgName].src = "i/nav/" + imgName + "-on.gif" }
}
// Flip it off
function out(imgName) {
	if (document.images)  {	document[imgName].src = "i/nav/" + imgName + ".gif"	}
}


//use the following var to remember an image's original src value
//the imageRoll function will constantly update this value, allowing the imageOut function to use its current value
var imageSourceValue = '';
function imageRoll(imageObject)
{
	//store the current src value
	imageSourceValue = imageObject.src;
	//grab the directory from the src attribute
	var folderIndex = imageObject.src.lastIndexOf("/");
	var theDirectory = imageObject.src.substring(0,folderIndex+1);//returns the DIR in the form http://domain.com/folder
	//test for image file type, jpg v. gif
	var extIndex = imageObject.src.lastIndexOf(".");
	
	var theFileName = imageObject.src.substring(folderIndex+1,extIndex);//returns the filename in the form NAME
	var theFileType = imageObject.src.substring(imageObject.src.length-(imageObject.src.length-extIndex-1));//grab the extension
	
	imageObject.src=theDirectory+'/'+theFileName+'-on.'+theFileType;
}
function imageOut(imageObject)
{
	//retrieve the original image src attribute
	imageObject.src = imageSourceValue;
}