Object.extend = function(destination, source)
{
  for (property in source) {
    destination[property] = source[property];
  }
  return destination;
}

Object.prototype.extend = function(object) 
{
  return Object.extend.apply(this, [this, object]);
}

//封装getEelementById函数
function $()
{
  var elements = new Array();
  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1) 
      return element;

    elements.push(element);
  }

  return elements;
}

//创建元素
function $ce(tagName)
{
    return document.createElement(tagName);	
}

//定义类类型
var Class = {
  create : function()
  {
    return function()
    {
      this.initialize.apply(this, arguments);
    }
  }
}

//对象绑定
Function.prototype.bind = function(object) {
  var __method = this;
  return function()
  {
    __method.apply(object, arguments);
  }
}

if (!window.Event) {
  var Event = new Object();
}

Object.extend(Event, {
  element: function(event) {
    return event.target || event.srcElement;
  },

  pointerX: function(event) {
    return event.pageX || (event.clientX + 
      (document.documentElement.scrollLeft || document.body.scrollLeft));
  },

  pointerY: function(event) {
    return event.pageY || (event.clientY + 
      (document.documentElement.scrollTop || document.body.scrollTop));
  },

  stop: function(event) {
    if (event.preventDefault) { 
      event.preventDefault(); 
      event.stopPropagation(); 
    } else {
      event.returnValue = false;
    }
  },

  position: function(element)
  { 
    var t = element.offsetTop; 
    var l = element.offsetLeft;
    while(element = element.offsetParent) 
    { 
        t += element.offsetTop; 
        l += element.offsetLeft; 
    } 
    var pos={top:t,left:l};
    return pos; 
  } ,

  observers: false,
  
  _observeAndCache: function(element, name, observer, useCapture) {
    if (!this.observers) this.observers = [];
    if (element.addEventListener) {
      this.observers.push([element, name, observer, useCapture]);
      element.addEventListener(name, observer, useCapture);
    } else if (element.attachEvent) {
      this.observers.push([element, name, observer, useCapture]);
      element.attachEvent('on' + name, observer);
    }
  },

  observe: function(element, name, observer, useCapture) {
    var element = $(element);
    useCapture = useCapture || false;
    
    if (name == 'keypress' &&
        ((navigator.appVersion.indexOf('AppleWebKit') > 0) 
        || element.attachEvent))
      name = 'keydown';
    
    this._observeAndCache(element, name, observer, useCapture);
  },

  stopObserving: function(element, name, observer, useCapture) {
    var element = $(element);
    useCapture = useCapture || false;
    
    if (name == 'keypress' &&
        ((navigator.appVersion.indexOf('AppleWebKit') > 0) 
        || element.detachEvent))
      name = 'keydown';
    
    if (element.removeEventListener) {
      element.removeEventListener(name, observer, useCapture);
    } else if (element.detachEvent) {
      element.detachEvent('on' + name, observer);
    }
  }
});

//鼠标翻转效果

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function scrollall(demo,demo1,demo2)
{
	var speed = 50; //定义滚动速度
	var _demo  = $(demo); //主容器
	var _demo1 = $(demo1);//内容
	var _demo2 = $(demo2);//copydiv
	
	_demo2.innerHTML = _demo1.innerHTML;
	
		 function Marquee()
		 {
			   if(_demo2.offsetTop-_demo.scrollTop<=0){
					 _demo.scrollTop-=_demo1.offsetHeight
			   }else{
					 _demo.scrollTop++
			   }
		 }
		 var MyMar=setInterval(Marquee,speed)
		 _demo.onmouseover=function() {clearInterval(MyMar)}
		 _demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
	
	
}