基于Jquery.history解决ajax的前进后退问题

!DOCTYPE html>
html xmlns="http://www.w3.org/1999/xhtml">
head>
  meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
  title>/title>
  script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js">/script>
  script src="js/jquery.history.js">/script>
/head>
body>

div id="divtxtinfo">input id="txtinfo" type="text"/>/div>
br/>
a funname="displayinfo" title="wxq" href="javascript:void(0);" class="apjax">提交/a>
br/>
log:
textarea id="log" style="width:100%;height:400px">/textarea>
/body>
/html>
script>
   ///随机数
  function guid() {
    function S4() {
      return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    }
    return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());
  }
 /// 回调的方法
  function doCallback(fn, args) {
    fn.apply(this, args);
  }
    ///获取查询字符串
  function GetQueryString() {
    var result = "";
    var url = location.href;
      if(url.indexOf("?")>0){
        result = url.substring(url.indexOf("?") + 1, url.length);
        if (result != "") {
          result = result + "";
        }
      }
    return "?" + result;
  }
  // 用来保存地址栏的参数，第一次页面加载的时候执行。 用来修改地址栏的时候，保留原始的参数
  var globalQuerystr;
  var golbalState = {
    "globalPara": {},// js调用方法执行时用的全局js参数，
    "globalControlValue": {},//js需要修改value的html组件 如文本 类似$(“#xxx”).val()
    "globalControlHtml": {},// js需要修改内部html内容的html组件 类似 $(“#yy”).html()
    "CallbackFunctions": "" // 回调的js方法 可以自己实现 ，用逗号分隔，一般是一个方法名
  };
  ///全局变量的问题 globaPara 保存全局变量
  ///多个控件变化 但是不在一个容器内的问题  数组的方式  History.pushState({state:1,rand:Math.random(), "globaPara":globaPara,  "valuecontrol":[{"txtuser":"1"},{"txtname":"2"}]  "htmlcontrol":[{"htmltxt":"b>hello/b>"},{"htmlcheckbox1":""}] },"title","?data=1"
  //控件类型的问题 有的保存值就行 有的保存html更方便
  (function (window, undefined) {
    globalQuerystr = GetQueryString();
    var
        History = window.History, // Note: We are using a capital H instead of a lower h
        State = History.getState(),
        $log = $('#log');
    console.info("页面加载完毕");
    History.log('initial:', State.data, State.title, State.url);
    //页面第一次加载的时候 State没有属性
    History.Adapter.bind(window, 'statechange', function () { // Note: We are using statechange instead of popstate
      // Log the State
      var State = History.getState(); // Note: We are using History.getState() instead of event.state
      golbalState = State.data;
      if (golbalState) {
        //修改控件的val值
        if (golbalState.globalControlValue) {
          for (var i = 0; i  golbalState.globalControlValue.length; i++) {
            $("#" + golbalState.globalControlValue[i].controlid).val(golbalState.globalControlValue[i].controlvalue);
          }
        }
        //修改全局变量
        if (golbalState.globalPara) {
          for (var i = 0; i  golbalState.globalPara.length; i++) {
            eval("" + golbalState.globalPara[i].globalname + " =" + golbalState.globalPara[i].globalvalue + ";");
          }
        }
        //修改控件的html
        if (golbalState.globalControlHtml) {
          for (var i = 0; i  golbalState.globalControlHtml.length; i++) {
            $("#" + golbalState.globalControlHtml[i].controlid).html(golbalState.globalControlHtml[i].controlhtml);
          }
        }
        //执行恢复参数后要执行的函数
        if (golbalState.CallbackFunctions != "") {
          doCallback(eval("" + golbalState.CallbackFunctions), null);
        }
        //清空函数
        golbalState.CallbackFunctions = "";
      }
      History.log('statechange:', State.data, State.title, State.url);
    });
  })(window);
  function displayinfo() {
    console.info("index:" + History.getCurrentIndex);
     //ajax方法，从服务器获取数据
    $("#txtinfo").val("我爱" + $("#txtUser").val() + $("#txtId").val());
  }
  $(function () {
    $(".apjax").on("click", function () {
      golbalState.globalControlValue = [{"controlid": "txtUser", "controlvalue": $("#txtUser").val()}];
      golbalState.CallbackFunctions = $(this).attr("funname");
      History.pushState(golbalState, $(this).attr("title"), globalQuerystr + "rnd=" + guid());
    });
  })
/script>