// This script based on Paul Snowden's work described on A List Apart
// <http://www.alistapart.com/stories/alternate/>
// Certain modifications (setFontSize and related) by Eric Meyer
// <http://www.meyerweb.com/eric/>

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('mh-size', fontVal, 365);
 docBase[0].style.fontSize = docSize;
 if (fontSet) {fontSet.value = fontVal;}
}

window.onload = function(e) {
 var cookie = readCookie('mh-style');
 var title = cookie ? cookie : getPreferredStyleSheet();
 setActiveStyleSheet(title);
 var cookie2 = readCookie('mh-size');
 if (cookie2) {setFontSize(cookie2);}
}

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

// var cookie = readCookie('mh-style');
// var title = cookie ? cookie : getPreferredStyleSheet();
// setActiveStyleSheet(title);
// var cookie2 = readCookie('mh-size');
// if (cookie2) {setFontSize(cookie2);}