// JavaScript Document

function setActiveStyleSheet(title) {
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
     }
   }
}

function previous(totalImages)
{
	//clear out variables each time function is called
	var currentImage = null;
	var currentInteger = null;
	var previousInteger = null;
	var previousImage = null;
	
	//curent image url
	//currentImage = document.photo.src;
	currentImage = document.location.href;
   //reg exp to match an integer
	var regExp = /[1-9][0-9]*/;
	//get current number image
	currentInteger  = currentImage.match(regExp)
	if (currentInteger == 1)
	{
		//return last number image
		previousInteger = totalImages;		
	}
	else
	{	
		//return current number image minus 1
		previousInteger = --currentInteger;
	}
	//replace url with new image number
	previousImage = currentImage.replace(regExp, previousInteger)
	//set the url to the previous number image
	//document.photo.href = previousImage;
   document.location.href = previousImage;
}

function next(totalImages)
{
	//clear out variables each time function is called
	var currentImage = null;
	var currentInteger = null;
	var previousInteger = null;
	var previousImage = null;
	
	//curent image url
	//currentImage = document.photo.src;
	currentImage = document.location.href;
   //reg exp to match an integer
	var regExp = /[1-9][0-9]*/;
	//get current number image
	var currentInteger  = currentImage.match(regExp)
   var nextInteger = null;
	if (currentInteger == totalImages)
	{
		//return last number image
		nextInteger  = 1;		
	}
	else
	{	
		//return current number image plus 1
		nextInteger  = ++currentInteger;
	}
	//replace url with new image number
	var nextImage = currentImage.replace(regExp, nextInteger)
   //set the url to the next number image
   //document.photo.src = nextImage;
   document.location.href = nextImage;
}