Button Onclientclick - Demo



<%@ Page Language="VB" %>
<script runat="server">

    Sub btnDelete_Click(sender AS Object, e As EventArgs)
        lblResult.Text = "All pages deleted!"
    End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Button OnClientClick</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Button
        id="btnDelete"
        Text="Delete Website"
        OnClick="btnDelete_Click"
        OnClientClick="return confirm('Are you sure?');" 
        Runat="server" />
    
    <br /><br />
    
    <asp:Label
        id="lblResult"
        Runat="server" />    
    
    </div>
    </form>
</body>
</html>