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 getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);


function select_thumb(large, thumb) {

	// Collect a list of all large photo containers
	var all_divs 	= document.getElementsByTagName('div');
	var photo_divs 	= new Array();
	for (i = 0; i < all_divs.length; i ++) {
		if (all_divs[i].id.indexOf("imagename-") == 0) {
			photo_divs.push(all_divs[i].id);
		}
	}

	// Collect a list of all thumbnail images
	var all_divs 	= document.getElementsByTagName('img');
	var thumb_divs	= new Array();
	for (i = 0; i < all_divs.length; i ++) {
		if (all_divs[i].id.indexOf("thumb-id-") == 0) {
			thumb_divs.push(all_divs[i].id);
		}
	}

	// Loop through every photo, as determined by the large photo container
	for (i = 0; i < photo_divs.length; i ++) {

		// Hide all large photo boxes, or show the desired large photo box
		if (document.getElementById(photo_divs[i])) {
			document.getElementById(photo_divs[i]).style.position = 
				(photo_divs[i] == "imagename-" + large)
				? "static"
				: "absolute";
		}
	// Hide all large photo boxes, or show the desired large photo box
		if (document.getElementById(photo_divs[i])) {
			document.getElementById(photo_divs[i]).style.left = 
				(photo_divs[i] == "imagename-" + large)
				? "0px"
				: "-10000px";
		}
//<p>position: absolute;</p>
  //          <p> left: -10000px;</p>
            
		// Unset the class names for all thumbnail images, or set the desired
		// thumbnail image's class name to "selected"
		if (document.getElementById(thumb_divs[i])) {
			document.getElementById(thumb_divs[i]).className = 
				(thumb_divs[i] == "thumb-id-" + thumb)
				? "selected"
				: "";
		}
	}
}