stta/twiki/pub/Plugins/SeeSkin/styleswitch.js

92 lines
2.8 KiB
JavaScript

// 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/>
// adapted to killerbee.ca by Matt Wilkie
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('killerbee-size', fontVal, 365);
docBase[0].style.fontSize = docSize;
if (fontSet) {fontSet.value = fontVal;}
}
window.onload = function(e) {
var cookie = readCookie('killerbee-style');
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);
var cookie2 = readCookie('killerbee-size');
if (cookie2) {setFontSize(cookie2);}
}
window.onunload = function(e) {
var title = getActiveStyleSheet();
createCookie('killerbee-style', title, 365);
}
// var cookie = readCookie('killerbee-style');
// var title = cookie ? cookie : getPreferredStyleSheet();
// setActiveStyleSheet(title);
// var cookie2 = readCookie('killerbee-size');
// if (cookie2) {setFontSize(cookie2);}