给moz-firefox下添加IE方法和属性

答案：在IECN看到心云写的关于互换select的JS，因里面用到removeNode和swapNode等方法，导致在Firefox下无效。刚刚Google了下，发现可以通过自定义原型来修正只在IE下有效的属性与方法。 

原文参考：http://www.phpx.com/happy/top97619.html 

修改方案如下： 

<script language="javascript" type="text/javascript"> 
<!-- 
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_

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