日期:2014-05-18 浏览次数:21342 次
<%@ 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">
function setList(){
var lists=document.getElementsByTagName("select");
for(var i=0;i<lists.length;i++){
lists[i].selectedIndex=1;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="1" Text="1" />
<asp:ListItem Value="2" Text="2" />
<asp:ListItem Value="3" Text="3" />
<asp:ListItem Value="4" Text="4" />
</asp:DropDownList>
<asp:DropDownList ID="DropDownList2" runat="server">
<asp:ListItem Value="1" Text="1" />
<asp:ListItem Value="2" Text="2" />
<asp:ListItem Value="3" Text="3" />
<asp:ListItem Value="4" Text="4" />
</asp:DropDownList>
<asp:DropDownList ID="DropDownList3" runat="server">
<asp:ListItem Value="1" Text="1" />
<asp:ListItem Value="2" Text="2" />
<asp:ListItem Value="3" Text="3" />
<asp:ListItem Value="4" Text="4" />
</asp:DropDownList>
<input id="Button1" type="button" value="button" onclick="setList()" />
</div>
</form>
</body>
</html>