// JavaScript Document
// This script based on Paul Snowden's work described on A List Apart

//  <http://www.alistapart.com/stories/alternate/>



function setActiveStyleSheet(title) {

  var i, a, main;

  if (title) {

    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;

}



function eraseCookie(name) {

	createCookie(name,'',-1);

}



function setFontSize(fontVal) {

	var fontSet = document.getElementById('fontSet');

	var docBase = new Array(); docBase = document.getElementsByTagName('body');

	if (!fontVal) {fontVal = document.getElementById('fontSet').value;}

	var docSize = fontVal+'px';

	createCookie('css-switch767-baseTextSize', fontVal, 365);

	docBase[0].style.fontSize = docSize;

	if (fontSet) {fontSet.value = fontVal;}

}



window.onload = function(e) {

  var cookie = readCookie('css-switch767-themeName');

  var title = cookie ? cookie : getPreferredStyleSheet();

  setActiveStyleSheet(title);

  var cookie2 = readCookie('css-switch767-baseTextSize');

  if (cookie2) {setFontSize(cookie2);}

}



window.onunload = function(e) {

  var title = getActiveStyleSheet();

  createCookie('css-switch767-themeName', title, 365);

}