让 FireFox 也支持 outerHTML

if(typeof(HTMLElement)!="undefined" && !window.opera)
...{
    HTMLElement.prototype.__defineGetter__("outerHTML",function()
    ...{
        var a=this.attributes, str="<"+this.tagName, i=0;for(;i<a.length;i++)
        if(a[i].specified)
            str+=" "+a[i].name+'="'+a[i].value+'"';
        if(!this.canHaveChildren)
            return str+" />";
        return str+">"+this.innerHTML+"</"+this.tagName+">";
    });
    HTMLElement.prototype.__defineSetter__("outerHTML",function(s)
    ...{
        var r = this.ownerDocument.createRange();
        r.setStartBefore(this);
        var df = r.createContextualFragment(s);
        this.parentNode.replaceChild(df, this);
        return s;
    });
    HTMLElement.prototype.__defineGetter__("canHaveChildren",function()
    ...{
        return !/^(area|base|basefont|col|frame|hr|img|br|input|isindex|link|meta|param)$/.test(this.tagName.toLowerCase());
    });
}