bind_event.js

bind_event.js

// bind event function
function bind_event(elem, ev, fn) {
  //elem object
  //ev event
  //fn function
  if (typeof elem == "undefined" || typeof ev == "undefined" || typeof fn == "undefined" || elem === null) {
    return false;
  }
  if (elem.addEventListener) {
    elem.addEventListener(ev, fn, false);
  } else if (elem.attachEvent) {
    // IE
    elem.attachEvent('on' + ev, function(e) {
      fn.call(elem, e);
    })
  } else {
    // incase of lower version IE, this pointer assign to the element by special call method. And don't forget the old function of this element's event
    var oldhandler = elem["on" + ev];
    elem["on" + ev] = function(e) {
      fn.call(elem, e);
      if (typeof oldhandler == "function") oldhandler.call(elem, e);
    };
  }
}

bing_event_2.js

function(elem, ev, fn) {
  elem.attachEvent ? elem.attachEvent("on" + ev, function(e) {
    e.call(elem, e)
  }) : elem.addEventListener && elem.addEventListener(ev, fn, true)
};