var vUrl = window.location.pathname;//当前浏览器的URL eg:/App******Data/App*****der.aspx
<script type="text/javascript">
function Return() {
if (confirm("确定要退回吗?")) {
return true;
}
return false;
}
</script>
<asp:Button ID="btnReturn" runat="server" Text="退回" Style="font: inherit; height: 30px;" OnClick="btnReturn_Click" OnClientClick="return Return()" />