Unified interface: js code for adding IE methods and attributes to FireFox_javascript skills

// JavaScript Document
// Unified interface: Add IE methods and attributes for FireFox
if(window.Event){// Modify the DOM of Event
/*
IE5 MacIE5 Mozilla Konqueror2.2 Opera5
event yes yes yes
event.returnValue yes no no no 
event.cancelBubble yes no no no 
event.srcElement yes yes no no
event.fromElement yes no no
*/
Event.prototype.__defineSetter__("returnValue",function(b){//
if(!b)this.preventDefault ();
return b;
});
Event.prototype.__defineSetter__("cancelBubble",function(b){// Set or retrieve the hierarchical bubble of the current event handler
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(){// Return the source node that the mouse moved out of
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(){// Return the source node that the mouse moved into
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      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      attr=attrs[i]; 
      if(attr.specified) 
        str =" " attr.name '="' attr.value '"'; 
      } 
    if(!this.canHaveChildren) 
      return str ">"; 
    return str ">" this.innerHTML ""; 
    }); 
  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); 
    } 
  }