toHandler.js

/*   toHandler function
 *   returns a handler with cross browser preventDefault and cancelPropagation options
 *   @func : function called with eventObject and the handler itself
 *   @preventDefault : boolean
 *   @cancelPropagation : boolean
 */  

function toHandler(func, preventDefault, cancelPropagation){
  var cache;
  return cache = function(object){
   func.call(this, object, cache);
    if(window.addEventListener !== undefined) {
      if(preventDefault) object.preventDefault();
      if(cancelPropagation) object.stopPropagation();
    } else {
      if(cancelPropagation) object.cancelBubble = true;
      if(preventDefault) return false
    }
  }
}