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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">
var iscroll;
function scrollobj(){
var obj=document.getElementById("tbSample");
obj.doScroll("pageDown");
}
function beginscroll(){
var obj=document.getElementById("autoscroll");
if(obj.checked)
iscroll = setInterval("scrollobj()", 10);
else
clearInterval(iscroll);
}
window.onload=beginscroll;
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="tbSample" runat="server" Height="168px" TextMode="MultiLine" Width="365px"></asp:TextBox>
<br />
<input id="autoscroll" type="checkbox" checked="CHECKED" onclick="beginscroll();" />自动滚动
</form>
</body>
</html>
this.textBox1.SelectionStart = this.textBox1.Text.Length;
this.textBox1.ScrollToCaret();