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form validation of text fields and checkbox

Dec 13, 2012 12:11 PM

Tags: #form #validation #checkbox

I have Dreamweaver CS3.  My form includes several field validations on text boxes and I was able to use a behavior on the form tag to validate my text fields, but I also have a Terms and Conditions checkbox that I need to validate as Checked.  Everything I have found online suggests using a spry checkbox to validate, but this seems to conflict with the code that is validating the text fields.


How can I validate my checkbox as well?




(in header)

function MM_validateForm() { //v4.0

  if (document.getElementById){

    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;

    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);

      if (val) {; if ((val=val.value)!="") {

        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');

          if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';

        } else if (test!='R') { num = parseFloat(val);

          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';

          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');

            min=test.substring(8,p); max=test.substring(p+1);

            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';

      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }

    } if (errors) alert('The following error(s) occurred:\n'+errors);

    document.MM_returnValue = (errors == '');

} }


(in body)

<form action="" method="post" id="Donation" onsubmit="MM_validateForm('NameOnCard','','R','CardNumber','','R','Cv v2','','R','BillingFirstName','','R','BillingLastName','','R','Billing Phone','','R','BillingEmail','','RisEmail','BillingAddress1','','R','B illingCity','','R','BillingPostalCode','','R');return document.MM_returnValue">


(checkbox that needs validation)

<input name="Terms" type="checkbox" />


gratefully, Amanda

  • Currently Being Moderated
    Dec 13, 2012 12:28 PM   in reply to CarolinaTigerRescue

    Personally, I'm not a fan of DW's built in JavaScript.  Better to learn JavaScript and write your own.  Even better to use server-side validation.


    Just my $0.02 worth.



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  • Currently Being Moderated
    Dec 13, 2012 4:30 PM   in reply to CarolinaTigerRescue

    I agree with WolfShade.  


    Client side validation will fail if JavaScript is disabled.  A lot of people disable JS for perceived browser security reasons.  Firefox even has an Add-on for this called NoScripts. 


    Server-side validation contained inside your form processing script is the safer & more reliable way to go.



    Nancy O.

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