View difference between Paste ID: ff045a79 and

 if (typeof String.trim == 'undefined') {
   String.prototype.trim = function () {
     return this.replace (/^\s+|\s+$/g, '');
   };
 }
 
 function Transition (e) {
 
   var prop = e.style.transitionProperty.split (',');
   var dur  = e.style.transitionDuration.split (',');
   this.e = e;
 
   // assert (true, (prop.length == dur.length));
 
   for (var i = 0; i < prop.length; i++)
     this[prop[i].trim ()] = dur[i].trim ();
 
   return this;
 
 }
 
 Transition.prototype = {
   getProperties: function () {
     var names = [];
     for (var p in this)
       if (typeof this[p] == 'string')
         names.push (p);
     return names;
   },
   applyTransitions: function (o) {
     var names = this.getProperties ();
     this.e.style.transitionProperty = names.join (', ');
     var dur = [];
 
     for (var n in names)
       dur.push (this[names[n]]);
 
     this.e.style.transitionDuration = dur.join (', ');
 
     if (typeof o == 'object')
       // ({width: '50px', height: '200px'})
       for (var p in o)
         this.e.style[p] = o[p];
   }
 };