解决Firefox下outerHTML不支持问题

代码很简单，如下：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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