js实现刷新页面后回到记录时滚动条的位置【两种

<script>
  var _h = 0;
  function SetH(o) {
   _h = o.scrollTop
   SetCookie("a", _h)
  }
  window.onload = function () {
   document.getElementById("x").scrollTop = GetCookie("a");//页面加载时设置scroll高度
  }
  function SetCookie(sName, sValue) {
   document.cookie = sName + "=" + escape(sValue) + "; ";
  }
  function GetCookie(sName) {
   var aCookie = document.cookie.split("; ");
   for (var i = 0; i < aCookie.length; i++) {
    var aCrumb = aCookie[i].split("=");
    if (sName == aCrumb[0])
     return unescape(aCrumb[1]);
   }
   return 0;
  }
 </script>

<div id="x" style="height: 200px; overflow: scroll" onscroll="SetH(this)">
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
   <p>1</p>
</div>

<script type="text/javascript">
  function KeepScrollBar() {
   var scrollPos;
   if (typeof window.pageYOffset != 'undefined') {
    scrollPos = window.pageYOffset;
   }
   else if (typeof document.body != 'undefined') {
    scrollPos = document.getElementById('divContent').scrollTop;
   }
   document.cookie = "scrollTop=" + scrollPos; 
  }
  window.onload = function (){
   if (document.cookie.match(/scrollTop=([^;]+)(;|$)/) != null) {
    var arr = document.cookie.match(/scrollTop=([^;]+)(;|$)/); 
    document.getElementById('divContent').scrollTop = parseInt(arr[1]); 
   }
  }
</script>

<div class="content" data-role="tab-content" data-id="course-a" runat="server" id="divContent" style="height: 365px; overflow-y: scroll" onscroll= "KeepScrollBar()">
    <p>   1</p>   
    <p>   2</p>   
    <p>   3</p>   
    <p>   4</p>   
    <p>   5</p>   
    <p>   6</p>   
    <p>   7</p>   
    <p>   8</p>   
    <p>   9</p>   
    <p>   10</p>   
    <p>   11</p>   
    <p>   12</p>   
    <p>   13</p>   
    <p>   14</p>   
    <p>   15</p>   
    <p>   16</p> 
</div>