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Data Valadation

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mpwright

mpwright

Technical User
Joined
Sep 13, 2004
Messages
27
Location
GB
Hi,

I am making an asp based shopping site & im having a problem with the javascript validation code at the checkout.
I need to make it so if a user tries to checkout but has nothing in there cart then an error message is dispayed & wont let them go any further. Could someone point me in the right direction please. The code im using is pasted below

Kind Regards

Mark


<html>
<head>
<SCRIPT LANGUAGE="JavaScript">
<!-- hide JS code
var justValidating = true
function validateForm(f){
var val = f.item.value;
if(/^\d{1,}$/.test(val)){
return true;
}else{
f.item.focus;
alert('Invalid Input for quantity');
return false;
}

}

// end JS hide -->
</SCRIPT>
</head>
<body bgcolor="#FFFFFF" vlink="blue"><form METHOD="get" ACTION="qtyupd.asp" target="_parent" onsubmit="return validateForm(this)">
<div align="center">
<table width="100%" border="0" cellspacing="0" cellpadding="0" height="100%">
<tr valign="top">
<td height="95%">
<div align="center">
<p><font size="5"><b><font face="Arial, Helvetica, sans-serif">Your
Shopping Cart</font></b></font></p>
<p>&nbsp;</p>
</div>
<table width="550" border="1" align="center" bordercolor="#000000" cellspacing="0" height="55">
<tr bgcolor="#333366">
<td height="25">
<table width="100%" border="0" cellspacing="0">
<tr>
<td width="310"><font size="2"><b><font face=Arial color=#FFFFFF>&nbsp;Item
Name</font></b></font></td>
<td width="90">
<div align="center"><font size="2"><b><font face=Arial color=#FFFFFF>Unit
Price</font></b></font></div>
</td>
<td width="32">
<div align="center"><font size="2"><b><font face=Arial color=#FFFFFF>Qty.</font></b></font></div>
</td>
<td width="110">
<div align="center"><font size="2"><b><font face=Arial color=#FFFFFF>Extended
Price</font></b></font></div>
</td>
</tr>
</table>
</td>
</tr>
<tr bgcolor="#FFFFFF">
<td height="25">
<table cellpadding=4 border=0 cellspacing=0 width='550' align="center">

<tr>
<td align='LEFT' colspan='5' gcolor='#EEEEEE' height="2" bgcolor="#CCCCCC">
<div align="center"><b><font face="Arial, Helvetica, sans-serif">Your
Shopping Cart is Empty</font></b></div>
</td>
</tr>

<tr bgcolor="#CCCCCC">
<td align='LEFT' colspan='3' gcolor='#EEEEEE' height="33" bgcolor="#FFFFFF"><font face="Arial, Helvetica, sans-serif" size="2"><b>Total,
Less Tax and Shipping &amp; Handling:</b></font></td>
<td align='RIGHT' width="6%" height="33">
<div align="center"><b><font face="Arial, Helvetica, sans-serif" size="2" color="#000000"></font></b></div>
</td>
<td align='RIGHT' width="20%" height="33">
<div align="center"><b><font face="Arial, Helvetica, sans-serif" size="2" color="#000000">£0.00&nbsp;</font></b></div>
</td>
</tr>
</table>
</td>
</tr>
</table>
<div align="center">
<p>&nbsp;</p>
<table width="400" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<div align="center"><a href="continue.asp?prodid=373" target="_parent"><img src="return.gif" alt="CONTINUE SHOPPING" border="0" width="93" height="35"></a></div>
</td>
<td>
<div align="center">
<input type="IMAGE" src="update.gif" border="0" name="UPDATE QUANTITIES" width="93" height="35">
</div>
</td>
<td>
<div align="center"><a href="emptycart.asp" target="_parent"><img src="clear.gif" alt="EMPTY CART" border="0" width="93" height="35"></a></div>
</td>
<td>
<div align="center"><a href="checkout.asp"><img src="checkout.gif" alt="CHECKOUT" border="0" width="93" height="35"></a></div>
</td>
</tr>
</table>
</div>

</form>
</body></html>
 
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You already know if it's empty don't you? I mean, your server-side code has already written out "Your
Shopping Cart is Empty".

That said, I can only guess that you're trying to check if the server-side has written out any form elements containing ordered items? Looks like there'll only be one form element written unless they've ordered something so you could use ...
Code: 
function validateForm( f ) {

	if( f.elements.length == 1 ) {
		alert( "There are no items in your cart." );
		return false;
	}
}
 
Upvote 0 Downvote
Hi,

Thanks for your help, im going to try and implement it on another page, but the message box isnt coming up, my code is below:

Conn.Execute(SQL)

set rs = nothing
conn.close

%>

<html>

<head>
<SCRIPT LANGUAGE="JavaScript">
<!-- hide JS code
function validateForm( f ) {

if( f.elements.length == 1 ) {
alert( "There are no items in your cart." );
return false;
}
}
// end JS hide -->
</SCRIPT>
<title>&nbsp;Your Order&nbsp;</title>
</head>
<body BGCOLOR="#FFFFFF">
<form action="confirm.asp" method=post target="_parent">
<center>
<font size="+2" face="Arial"><b>Step 1</b> - Shipping Information</font>
<br><br>
<table width="510" border="2" cellspacing="0" cellpadding="0"

bordercolor="#303068">
<tr>
<td height="248">
<table border="0" cols="2" width="100%" align="center" cellspacing="0">
<tr bgcolor="#333366">
<td colspan="2" height="25">
<div align="center"><font face="Tahoma,Arial"><b><font size="3"

color="#FFFFFF" face="Verdana, Arial, Helvetica, sans-serif">3-day
UPS Ground Shipping Schedule</font></b></font> </div>
</td>
</tr>
<tr>
<td height="155" valign="top" colspan="2">
<table width="100%" border="0" cellspacing="0" cellpadding="6">
<tr bgcolor="#FFFFFF">
<td width="45%"><b><font face="Tahoma,Arial" size="2">Order
Subordertotal</font></b><font size="2"><br>
<font face="Tahoma,Arial">£0 - £50<br>
£51 - £100 <br>
£101 - £150 <br>
£151 - £200 <br>
£201 - £250 <br>
£251 - £300<br>
£301 - £400<br>
£401 - £500<br>
£ 500 +</font></font> </td>
<td width="55%"><b><font face="Tahoma,Arial" size="2">Standard
Shipping</font></b><font size="2"><br>
<font face="Tahoma,Arial">£6.95<br>
£9.95<br>
£12.95<br>
£15.95 <br>
£18.95<br>
£21.95<br>
£24.95<br>
£27.95<br>
£31.95</font></font></td>
</tr>
</table>
</td>
</tr>
<tr bgcolor="#333366">
<td height="27" valign="top" width="85%"><font

color="#FFFFFF"><b><font face="arial">Subtotal
excluding tax and shipping:</font></b></font></td>
<td width="15%" height="27" valign="top"><font

color="#FFFFFF"><b><font face="arial"><%Response.Write

formatcurrency(ordertotal)%></font></b></font></td>
</tr>
<tr bgcolor="#333366">
<td height="25" valign="top" width="85%"><font face="Arial,

Helvetica, sans-serif" color="#FFFFFF"><b>
Shipping & Handling Charges:</b></font></td>
<td width="15%" height="25" valign="top"><font face="Arial,

Helvetica, sans-serif" color="#FFFFFF"><b><%

'---------------------- Shipping Calculation -------------------------

if ordertotal > 0 and ordertotal <= 50 then ShippingMethod = 6.95
if ordertotal > 51 and ordertotal <= 100 then ShippingMethod = 9.95
if ordertotal > 101 and ordertotal <= 150 then ShippingMethod = 12.95
if ordertotal > 151 and ordertotal <= 200 then ShippingMethod = 15.95
if ordertotal > 201 and ordertotal <= 250 then ShippingMethod = 18.95
if ordertotal > 251 and ordertotal <= 300 then ShippingMethod = 21.95
if ordertotal > 301 and ordertotal <= 400 then ShippingMethod = 24.95
if ordertotal > 401 and ordertotal <= 500 then ShippingMethod = 27.95
if ordertotal > 500 then ShippingMethod = 31.95

'-----------------------------------------------------------------------

Response.Write Formatcurrency(ShippingMethod) %></b></font></td>
</tr>
<tr bgcolor="#FFFFFF">
<td height="7" valign="top" colspan="2"> <%'------------------Tax

Checkbox----------------------------%>
<font face="Arial, Helvetica, sans-serif"> <font size="2"> <font

color="#FFFFFF">
<font size="1">
<input type="checkbox" name="tax" value="on">
<b><font color="#000000"> Click here if you will pay tax:
17.5% tax will be calculated to your order total.

</font></b></font></font></font></font></td>
<%'-----------------------------------------------------------%>
</tr>
</table>
</td>
</tr>
</table>
<br>
<table width="510" border="2" cellspacing="0" cellpadding="0"

bordercolor="#383868">
<tr bgcolor="#333366">
<td height="25">
<div align="center"><font face="Verdana, Arial, Helvetica,

sans-serif"><b><font color="#FFFFFF">Personal
Information</font></b></font></div>
</td>
</tr>
<tr bgcolor="EEEEEE">
<td height="293">
<table width="100%" border="0" align="center" cellspacing="0">
<tr>
<td bgcolor="#EEEEEE" width="39%" height="36"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;Name</font></b></font></td>
<td width="61%" height="36" bgcolor="EEEEEE">
<input type="text" name="Name" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="36"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;Company</font></b></font></td>
<td width="61%" height="36" bgcolor="EEEEEE">
<input type="text" name="CompanyName" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="37"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;Street</font></b></font></td>
<td width="61%" height="37" bgcolor="EEEEEE">
<input type="text" name="Street" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="36"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;City</font></b></font></td>
<td width="61%" height="36" bgcolor="EEEEEE">
<input type="text" name="City" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="37"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;County</font></b></font></td>
<td width="61%" height="37" bgcolor="EEEEEE">
<input type="text" name="County" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="37"><font

color="#333366"><b><font face="Arial, Helvetica, sans-serif">&nbsp;Post

Code</font></b></font></td>
<td width="61%" height="37" bgcolor="EEEEEE">
<input type="text" name="Post" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%" height="36"><font

color="#333366"><b><font face="Arial, Helvetica,

sans-serif">&nbsp;Phone</font></b></font></td>
<td width="61%" height="36" bgcolor="EEEEEE">
<input type="text" name="Phone" size="25">
</td>
</tr>
<tr>
<td bgcolor="#EEEEEE" width="39%"><font color="#333366"><b><font

face="Arial, Helvetica, sans-serif">&nbsp;E-mail</font></b></font></td>
<td width="61%" bgcolor="EEEEEE">
<input type="text" name="CusEmail" size="25">
</td>
</tr>
</table>
</td>
</tr>
</table>
<p><br>
</p>
<br>
<b><font face="arial"> </font></b>
<input type="hidden" name="ShippingMethod" value="<% = ShippingMethod %>">
<input type="hidden" name="ordertotal" value=<%Response.write(ordertotal)%>>
<input type="submit" value=" Proceed to Order Confirmation Page ">
</center></form></html>


<%

%>
 
Upvote 0 Downvote

That snippet won't fire unless the number of form elements is 1 which is clearly not the case in your *new* code.

Simplify your example a bit - no server-side code in it for a start! What field(s) are you trying to check and for what values?
 
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