/*
==============================================================================================================================
styleswitcher.js
- switch between one of three stlye sheets to increade and decrease the font in the center content section

style switching from the article on "A List Apart"
http://www.alistapart.com/articles/alternate/
note: no coolies are being used to record preference here as that is not a requirement for tis site
==============================================================================================================================
*/
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 cycleStyles(){
	var title = parseInt(getActiveStyleSheet());
	title+=1;
	if(title>3){title=1;}
	setActiveStyleSheet(title + "");
}
window.onload = function(e) {
  var title = getPreferredStyleSheet();
  setActiveStyleSheet(title);
}