页面的div中有滚动条,js实现刷新页面后回到记录时滚动条的位置

  当div中绑定数据,给它一个属性overflow-y: scroll,添加长度大小,使其能够出现滚动条;每次刷新的时候滚动条总是会出现在最上方,这使我很头疼,经过查阅网上资料,返现两种方法可行。如下:

第一种方案

  将上一个页面的div的scrolltop距离长度记录在cookie中,然后通过js调整刷新页面时的长度记录,代码如下:

js代码:

 

<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scrolltop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>

 

 

 

 

html中代码如下:

 

<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>

 

第二种方案

  1.通过div的onscroll事件记录滚动条的scrollTop值,设置到document.cookie
  2.页面加载时再读取document.cookie的值,设置给div的scrollTop

js代码实现:

 

<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>

 

html:

<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>

 

posted @ 2016-10-28 10:34  edisoner  阅读(6490)  评论(0编辑  收藏  举报