<%@ Page Language="vb" AutoEventWireup="false" Codebehind="OrderSupplies.aspx.vb" Inherits="supplies.OrderSupplies"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <title>OrderSupplies</title> <script language="vbscript"> Sub ValidateQuantity(s, e) Dim strValue As String strValue = e.Value e.IsValid = True If Not IsNumeric(strValue) Then e.IsValid = False End If End Sub </script> <meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR"> <meta content="Visual Basic 7.0" name="CODE_LANGUAGE"> <meta content="JavaScript" name="vs_defaultClientScript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <asp:label id="Label1" style="Z-INDEX: 101; LEFT: 13px; POSITION: absolute; TOP: 70px" runat="server">Enter Quantity:</asp:label> <asp:textbox id="txtQuantity" style="Z-INDEX: 102; LEFT: 112px; POSITION: absolute; TOP: 71px" runat="server">0</asp:textbox> <asp:button id="cmdAdd" style="Z-INDEX: 104; LEFT: 113px; POSITION: absolute; TOP: 102px" runat="server" Text="Add to Cart"></asp:button> <asp:customvalidator id="CustomValidator" style="Z-INDEX: 105; LEFT: 282px; POSITION: absolute; TOP: 101px" runat="server" ControlToValidate="txtQuantity" ErrorMessage="Must enter a quantity greater than zero." ClientValidationFunction="ValidateQuantity" Display="Dynamic"></asp:customvalidator> </form> </body> </HTML>