title: Javascript event, the parameter "e" , "event" or other
body: <p><a href="http://jsfiddle.net/kent93/9UNyH/" rel="nofollow">My code</a>:</p>
  
  <pre><code>var transformString = Modernizr.prefixed('transform');
  var inputDown, inputMove, inputUp;
  
  
  if (window.Touch) {
    inputDown = "touchstart";
    inputMove = "touchmove";
    inputUp = "touchend";
  }
  else {
    inputDown = "mousedown";
    inputMove = "mousemove";
    inputUp = "mouseup";
  }
  
  var mouse = { startX: 0, startY: 0 };
  var innerElement = $('.threedee');
  
  function normalizedX(event){
      return window.Touch ? event.originalEvent.touches[0].pageX : event.pageX;
  }    
  
  function normalizedY(event){
      return window.Touch ? event.originalEvent.touches[0].pageY : event.pageY;
  }
  
  $(document).bind(inputDown, function(event){
    event.preventDefault();
    if(event.button === 2) return true; // right-click
    mouse.startX = normalizedX(event);
    mouse.startY = normalizedY(event);
    // store the transform state
    // globalMatrix.setMatrixValue($inner.css('-webkit-transform'));
    $(document)
     .bind(inputMove, move)
     .one(inputUp, function(){ $(document).unbind(inputMove); });
  });
  
  function move(event){
    event.preventDefault();
    var offsetX = normalizedX(event) - mouse.startX;
    var offsetY = normalizedY(event) - mouse.startY;
    if(event.shiftKey){
     offsetX = roundToMultiple(offsetX, 15);
     offsetY = roundToMultiple(offsetY, 15);
    }
    innerElement.css(transformString, 'rotateY('+offsetX+'deg) rotateX('+-offsetY+'deg)');
    /* move relative to the initial position
    $inner.css('-webkit-transform', globalMatrix.rotate(-offsetY, offsetX, 0));//*/
  }
  
  function roundToMultiple(number, multiple){
    var value = number/multiple
    ,   integer = Math.floor(value)
    ,   rest = value - integer;
    return rest &gt; 0.5 ? (integer+1)*multiple : integer*multiple;
  }​
  </code></pre>
  
  <p>Try to look at the javascript part only, my problem is there.</p>
  
  <p>I am wondering why the "event" will pass as parameter and argument for most of the function in the script. Sometime it may be "e" also. Who created them???</p>
  
  <p>I myself never created any "event" variable, who is responsible for this "event" variable.</p>