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>