JavaScript为指定的对象添加多个事件处理程序

如果你希望对象点击的时候同时处理多个事情，可以使用下面的代码

/* Start of the multihandle Object...*/
function MultiHandle(owner){
  var my_handlers = new Array();
  var my_owner = owner;
  this.append = function(handler){
    my_handlers[my_handlers.length] = handler;
  }
  this.fire = function(evt){
    var i;
    for(i = 0; i < my_handlers.length; i++){
      my_owner.tempspace = my_handlers[i];
      my_owner.tempspace(evt);
    }
  }
}
/* End of the multihandle object*/
/* start of the object add event handler script */
/*This bit goes where you'd normally write... 
... object.onmouseup = [event handler]...
... where [event handler] is an existing function ...
... that handles an event,  or even an 
... anonymous function.*/
if(typeof(MultiHandle) != "undefined"){
  var mup_handler = object.mh_onmouseup;
  if(!mup_handler){
    mup_handler = new MultiHandle(object);
    object.mh_onmouseup = mup_handler;
    object.onmouseup = function(evt){this.mh_onmouseup.fire(evt);};
  }
  mup_handler.append([event handler]);
}else{
  object.onmouseup = [event handler];
}
/* end of the object add event handler script*/