Use JavaScript, It's a life saver. We load nearly all of our validation
scripts in a header file so you call the validation anytime you need it. We
never use CFForm because it writes the Javascripts for you. If need to call
any JavaScript on an event with a CFForm element is such as onBlur it won't
work.
here's an example we implement our JavaScript.
<SCRIPT LANGUAGE="JavaScript">
<!--
// Checks the E-MAIL field.
function valid(form) {
var field = form.EmailAdd; // email field
var str = field.value; // email string
var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
var reg2 =
/^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
if (!reg1.test(str) && reg2.test(str)) { // if syntax is valid
return true;
}
alert("\"" + str + "\" is an invalid e-mail!"); // alerts that
e-mail is
invalid
field.focus(); //resets focus to e-mail form element
field.select(); //select all characters in that field
return false;
}
//-->
</SCRIPT>
Now inside your form you element would look like this;
<input type="text" name="EmailAdd" size="20" maxlength="50" onBlur="return
valid(BuilderInfo)" class="mandatory">
Where "BuilderInfo" would be your form name
Hope this helps.
Will
-----Original Message-----
From: Chris Alvarado [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 12, 2001 12:57 PM
To: CF-Talk
Subject: RE: Form validation without alert boxes
as far as the server side goes here is what I do.
<!--- param the variable Error --->
<cfparam name="Error" default="">
<!--- check to see if the First Name is blank --->
<cfif Trim(FirstName) Is "">
<cfset FNameNullError = "Please enter a First Name">
<cfset Error = "True">
</cfif>
<cfif Error Is "True">
<cfinclude template="UserInfoPage.cfm">
<cfelse>
Process all of the stuff
</cfif>
THEN
on the page that submitted the form.
<cfif IsDefined("FNameNullError")>
<font face="verdana" size="1"
color="red"><cfoutput>#FNameNullError#</cfoutput></font>
</cfif>
Let me know if you have any questions.
-chris.alvarado
[developer] - VerticalNet
-----Original Message-----
From: James Birchler [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 12, 2001 11:45 AM
To: CF-Talk
Subject: Form validation without alert boxes
1. Client side: Could someone please show me an example of doing client-side
form validation that doesn't use the alertbox method? It would be nice if
next to the input field the user would simply see red text explaining their
input error.
2. Server side: How about server-side validation using CFFORM with the same
kind of output--is there an easy way to re-display the original form fields
with error messages where applicable and keeping/displaying the form entries
the user has properly entered?
I just need a solid starting point for these problems.
Many thanks,
James
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