// drop-down menu code (to help out poor old IE)

sfHover = function() {
    var sfEls = document.getElementById("ulNavBar").getElementsByTagName("li");
    for (var i=0; i<sfEls.length; i++) {
	    sfEls[i].onmouseover=function() {
		    this.className+=" sfhover";
	    }
	    sfEls[i].onmouseout=function() {
		    this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
	    }
    }
}

if (window.attachEvent) window.attachEvent("onload", sfHover);

// functions for accessibility stylesheet swapping

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);


// text-only functions

function disableCSS()
{
	if (document.getElementsByTagName)
		x = document.getElementsByTagName('link');
	else if (document.all)
		x = document.all.tags('link');
	else
	{
		alert('This script does not work in your browser');
		return;
	}
	for (var i=0;i<x.length;i++)
	{
		x[i].disabled = true;
	}
	a = document.getElementById('aText');
	a.href = "javascript:enableCSS()"
}


function enableCSS()
{
	if (document.getElementsByTagName)
		x = document.getElementsByTagName('link');
	else if (document.all)
		x = document.all.tags('link');
	else
	{
		alert('This script does not work in your browser');
		return;
	}
	for (var i=0;i<x.length;i++)
	{
		x[i].disabled = false;
	}
	a = document.getElementById('aText');
	a.href = "javascript:disableCSS()"
}