上面的代码在里会正确得出结果,但在FireFox里就不行了,因为outerHTML不是W3C的标准属性,网上找了下使用DOM原型扩展方法解决,代码如下: 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()); }); }