Transfinite Ordinal Calculator: src/xlib.js

src/xlib.js

/*! Built from X 4.23 by XAG 1.0. 09Aug12 20:01 UT */
xLibrary={version:'4.23',license:'GNU LGPL',url:'http://cross-browser.com/'};
// xAddClass r3, Copyright 2005-2007 Daniel Frechette - modified by Mike Foster
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xAddClass(e, c)
{
  if ((e=xGetElementById(e))!=null) {
    var s = '';
    if (e.className.length && e.className.charAt(e.className.length - 1) != ' ') {
      s = ' ';
    }
    if (!xHasClass(e, c)) {
      e.className += s + c;
      return true;
    }
  }
  return false;
}
// xAddEventListener r8, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xAddEventListener(e,eT,eL,cap)
{
  if(!(e=xGetElementById(e)))return;
  eT=eT.toLowerCase();
  if(e.addEventListener)e.addEventListener(eT,eL,cap||false);
  else if(e.attachEvent)e.attachEvent('on'+eT,eL);
  else {
    var o=e['on'+eT];
    e['on'+eT]=typeof o=='function' ? function(v){o(v);eL(v);} : eL;
  }
}
// xGetElementById r2, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xGetElementById(e)
{
  if (typeof(e) == 'string') {
    if (document.getElementById) e = document.getElementById(e);
    else if (document.all) e = document.all[e];
    else e = null;
  }
  return e;
}
// xGetElementsByClassName r7, Copyright 2002-2011 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xGetElementsByClassName(c,p,t,f)
{
  var r=[], re, e, i, l;
  re = new RegExp("(^|\\s)"+c+"(\\s|$)");
//  var e = p.getElementsByTagName(t);
  e = xGetElementsByTagName(t,p); // See xml comments.
  for (i=0, l=e.length; i<l; ++i) {
    if (re.test(e[i].className)) {
      r[r.length] = e[i];
      if (f) f(e[i]);
    }
  }
  return r;
}
// xGetElementsByTagName r5, Copyright 2002-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xGetElementsByTagName(t,p)
{
  var list = null;
  t = t || '*';
  p = xGetElementById(p) || document;
  if (typeof p.getElementsByTagName != 'undefined') { // DOM1
    list = p.getElementsByTagName(t);
    if (t=='*' && (!list || !list.length)) list = p.all; // IE5 '*' bug
  }
  else { // IE4 object model
    if (t=='*') list = p.all;
    else if (p.all && p.all.tags) list = p.all.tags(t);
  }
  return list || [];
}
// xHasClass r3, Copyright 2005-2007 Daniel Frechette - modified by Mike Foster
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xHasClass(e, c)
{
  e = xGetElementById(e);
  if (!e || e.className=='') return false;
  var re = new RegExp("(^|\\s)"+c+"(\\s|$)");
  return re.test(e.className);
}
// xRemoveClass r3, Copyright 2005-2007 Daniel Frechette - modified by Mike Foster
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
function xRemoveClass(e, c)
{
  if(!(e=xGetElementById(e))) return false;
  e.className = e.className.replace(new RegExp("(^|\\s)"+c+"(\\s|$)",'g'),
    function(str, p1, p2) { return (p1 == ' ' && p2 == ' ') ? ' ' : ''; }
  );
  return true;
}