// JavaScript Document
// JavaScript Document
// 统一接口：为FireFox添加IE的方法和属性
if(window.Event){// 修正Event的DOM
  /*
                IE5    MacIE5    Mozilla    Konqueror2.2    Opera5
  event            yes    yes      yes      yes          yes
  event.returnValue      yes    yes      no      no          no
  event.cancelBubble      yes    yes      no      no          no
  event.srcElement      yes    yes      no      no          no
  event.fromElement      yes    yes      no      no          no
   */
  Event.prototype.__defineSetter__("returnValue",function(b){// 
    if(!b)this.preventDefault();
    return b;
    });
  Event.prototype.__defineSetter__("cancelBubble",function(b){// 设置或者检索当前事件句柄的层次冒泡
    if(b)this.stopPropagation();
    return b;
    });
  Event.prototype.__defineGetter__("srcElement",function(){
    var node=this.target;
    while(node.nodeType!=1)node=node.parentNode;
    return node;
    });
  Event.prototype.__defineGetter__("fromElement",function(){// 返回鼠标移出的源节点
    var node;
    if(this.type=="mouseover")
      node=this.relatedTarget;
    else if(this.type=="mouseout")
      node=this.target;
    if(!node)return;
    while(node.nodeType!=1)node=node.parentNode;
    return node;
    });
  Event.prototype.__defineGetter__("toElement",function(){// 返回鼠标移入的源节点
    var node;
    if(this.type=="mouseout")
      node=this.relatedTarget;
    else if(this.type=="mouseover")
      node=this.target;
    if(!node)return;
    while(node.nodeType!=1)node=node.parentNode;
    return node;
    });
  Event.prototype.__defineGetter__("offsetX",function(){
    return this.layerX;
    });
  Event.prototype.__defineGetter__("offsetY",function(){
    return this.layerY;
    });
  }
if(window.Document){// 修正Document的DOM
  /*
                IE5    MacIE5    Mozilla    Konqueror2.2    Opera5
  document.documentElement  yes    yes      yes      yes          no
  document.activeElement    yes    null    no      no          no
  
  */
  }
if(window.Node){// 修正Node的DOM
  /*
                IE5    MacIE5    Mozilla    Konqueror2.2    Opera5
  Node.contains        yes    yes      no      no          yes
  Node.replaceNode      yes    no      no      no          no
  Node.removeNode        yes    no      no      no          no
  Node.children        yes    yes      no      no          no
  Node.hasChildNodes      yes    yes      yes      yes          no
  Node.childNodes        yes    yes      yes      yes          no
  Node.swapNode        yes    no      no      no          no
  Node.currentStyle      yes    yes      no      no          no
  
  */
  Node.prototype.replaceNode=function(Node){// 替换指定节点
    this.parentNode.replaceChild(Node,this);
    }
  Node.prototype.removeNode=function(removeChildren){// 删除指定节点
    if(removeChildren)
      return this.parentNode.removeChild(this);
    else{
      var range=document.createRange();
      range.selectNodeContents(this);
      return this.parentNode.replaceChild(range.extractContents(),this);
      }
    }
  Node.prototype.swapNode=function(Node){// 交换节点
    var nextSibling=this.nextSibling;
    var parentNode=this.parentNode;
    node.parentNode.replaceChild(this,Node);
    parentNode.insertBefore(node,nextSibling);
    }
  }
if(window.HTMLElement){
  HTMLElement.prototype.__defineGetter__("all",function(){
    var a=this.getElementsByTagName("*");
    var node=this;
    a.tags=function(sTagName){
      return node.getElementsByTagName(sTagName);
      }
    return a;
    });
  HTMLElement.prototype.__defineGetter__("parentElement",function(){
    if(this.parentNode==this.ownerDocument)return null;
    return this.parentNode;
    });
  HTMLElement.prototype.__defineGetter__("children",function(){
    var tmp=[];
    var j=0;
    var n;
    for(var i=0;i<this.childNodes.length;i++){
      n=this.childNodes[i];
      if(n.nodeType==1){
        tmp[j++]=n;
        if(n.name){
          if(!tmp[n.name])
            tmp[n.name]=[];
          tmp[n.name][tmp[n.name].length]=n;
          }
        if(n.id)
          tmp[n.id]=n;
        }
      }
    return tmp;
    });
  HTMLElement.prototype.__defineGetter__("currentStyle", function(){
    return this.ownerDocument.defaultView.getComputedStyle(this,null);
    });
  HTMLElement.prototype.__defineSetter__("outerHTML",function(sHTML){
    var r=this.ownerDocument.createRange();
    r.setStartBefore(this);
    var df=r.createContextualFragment(sHTML);
    this.parentNode.replaceChild(df,this);
    return sHTML;
    });
  HTMLElement.prototype.__defineGetter__("outerHTML",function(){
    var attr;
    var attrs=this.attributes;
    var str="<"+this.tagName;
    for(var i=0;i<attrs.length;i++){
      attr=attrs[i];
      if(attr.specified)
        str+=" "+attr.name+'="'+attr.value+'"';
      }
    if(!this.canHaveChildren)
      return str+">";
    return str+">"+this.innerHTML+"</"+this.tagName+">";
    });
  HTMLElement.prototype.__defineGetter__("canHaveChildren",function(){
    switch(this.tagName.toLowerCase()){
      case "area":
      case "base":
      case "basefont":
      case "col":
      case "frame":
      case "hr":
      case "img":
      case "br":
      case "input":
      case "isindex":
      case "link":
      case "meta":
      case "param":
        return false;
      }
    return true;
    });

  HTMLElement.prototype.__defineSetter__("innerText",function(sText){
    var parsedText=document.createTextNode(sText);
    this.innerHTML=parsedText;
    return parsedText;
    });
  HTMLElement.prototype.__defineGetter__("innerText",function(){
    var r=this.ownerDocument.createRange();
    r.selectNodeContents(this);
    return r.toString();
    });
  HTMLElement.prototype.__defineSetter__("outerText",function(sText){
    var parsedText=document.createTextNode(sText);
    this.outerHTML=parsedText;
    return parsedText;
    });
  HTMLElement.prototype.__defineGetter__("outerText",function(){
    var r=this.ownerDocument.createRange();
    r.selectNodeContents(this);
    return r.toString();
    });
  HTMLElement.prototype.attachEvent=function(sType,fHandler){
    var shortTypeName=sType.replace(/on/,"");
    fHandler._ieEmuEventHandler=function(e){
      window.event=e;
      return fHandler();
      }
    this.addEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
    }
  HTMLElement.prototype.detachEvent=function(sType,fHandler){
    var shortTypeName=sType.replace(/on/,"");
    if(typeof(fHandler._ieEmuEventHandler)=="function")
      this.removeEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
    else
      this.removeEventListener(shortTypeName,fHandler,true);
    }
  HTMLElement.prototype.contains=function(Node){// 是否包含某节点
    do if(Node==this)return true;
    while(Node=Node.parentNode);
    return false;
    }
  HTMLElement.prototype.insertAdjacentElement=function(where,parsedNode){
    switch(where){
      case "beforeBegin":
        this.parentNode.insertBefore(parsedNode,this);
        break;
      case "afterBegin":
        this.insertBefore(parsedNode,this.firstChild);
        break;
      case "beforeEnd":
        this.appendChild(parsedNode);
        break;
      case "afterEnd":
        if(this.nextSibling)
          this.parentNode.insertBefore(parsedNode,this.nextSibling);
        else
          this.parentNode.appendChild(parsedNode);
        break;
      }
    }
  HTMLElement.prototype.insertAdjacentHTML=function(where,htmlStr){
    var r=this.ownerDocument.createRange();
    r.setStartBefore(this);
    var parsedHTML=r.createContextualFragment(htmlStr);
    this.insertAdjacentElement(where,parsedHTML);
    }
  HTMLElement.prototype.insertAdjacentText=function(where,txtStr){
    var parsedText=document.createTextNode(txtStr);
    this.insertAdjacentElement(where,parsedText);
    }
  HTMLElement.prototype.attachEvent=function(sType,fHandler){
    var shortTypeName=sType.replace(/on/,"");
    fHandler._ieEmuEventHandler=function(e){
      window.event=e;
      return fHandler();
      }
    this.addEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
    }
  HTMLElement.prototype.detachEvent=function(sType,fHandler){
    var shortTypeName=sType.replace(/on/,"");
    if(typeof(fHandler._ieEmuEventHandler)=="function")
      this.removeEventListener(shortTypeName,fHandler._ieEmuEventHandler,false);
    else
      this.removeEventListener(shortTypeName,fHandler,true);
    }
  }