jquery 插件--简单页面导航

(function($,W) {     $.fn.nav = function(options) {   $this = $(this);   var defaults = {editing:false,parent:false,beforeQuit:function(){}   };   defautls = $.extend(defaults,options);   var data;   if(defaults.parent){   data = parent.navs = [];   }else{   data = parent.navs = parent.navs || [];   }   var url = W.document.location.href;   var title = W.document.getElementsByTagName("title")[0].innerText;      var node = new navNode(url,title);      var index = -1;   for(var i=0;i<data.length;i++){   if(data[i].name == title){   index = i;   break;   }    }   if(index == -1){   data.push(node);   }else{   data.splice(index+1,data.length-index-1);   }   var html = "当前位置:";   for(var i=0;i<data.length;i++){   if(i != 0)   html += ">>";   if(i == data.length -1){  html += "<a dataIndex=\""+ i +"\">"+ data[i].name +"</a>";   }else{  html += "<a href=\"javascript:void(0);\" dataIndex=\""+ i +"\">"+ data[i].name +"</a>";   }   }   $this.append(html);   $this.css({"margin":"10px"});   $this.delegate("a", "click",data, function() {   var index = $(this).attr("dataIndex");   if(index != data.length -1){   if(defaults.editing){   $.omMessageBox.confirm({title : '确认离开',content : '您当前处于编辑状态，确认离开？',onClose : function(v) {if (v) {W.document.location.href = data[index].url;}}});   }else{   W.document.location.href = data[index].url;   }   }   });   };   function navNode(url,name){   this.url = url;   this.name = name;   }navNode.prototype.toString = function(){   return "<span>"+ name +"</span>";};})(jQuery,window);   

$("#nav").nav({}); 

iframe 页面

<div id="nav"></div>

适用情况

主页面包含<iframe />

子页面包含<title/>