<%@ page language="C#" autoeventwireup="true" inherits="Common_Ppc, App_Web_gjj4kpp5" enableviewstatemac="false" enableEventValidation="false" viewStateEncryptionMode="Never" %>
<!DOCTYPE html>
<html>
<head runat="server">
<title>多级选择</title>
</head>
<body>
<form id="form1" runat="server">
<div>
	<asp:DropDownList ID="Select1" runat="server"  AutoPostBack="True" onselectedindexchanged="Select1_SelectedIndexChanged"></asp:DropDownList>
	<asp:DropDownList ID="Select2" runat="server"  AutoPostBack="True" onselectedindexchanged="Select2_SelectedIndexChanged"></asp:DropDownList>
	<asp:DropDownList ID="Select3" runat="server"  AutoPostBack="True" onselectedindexchanged="Select3_SelectedIndexChanged"></asp:DropDownList>
	<input id="address" runat="server" type="hidden" />
</div>
</form>
</body>
</html>
<script type="text/javascript">
function Display(grade) {
	switch (grade) {
		case 1:
			document.getElementById('Select1').style.display = "";
			document.getElementById('Select2').style.display = "none";
			document.getElementById('Select3').style.display = "none";
			break;
		case 2:
			document.getElementById('Select1').style.display = "";
			document.getElementById('Select2').style.display = "";
			document.getElementById('Select3').style.display = "none";
			break;
		case 3:
			document.getElementById('Select1').style.display = "";
			document.getElementById('Select2').style.display = "";
			document.getElementById('Select3').style.display = "";
			break;
	}
}
</script>