radio button validation

nawrioj · Mar 21, 2005

Hi
I'm trying to use this function to validate radio button but it doesn't seem to work. Can anybody tell me what's wrong with it ? What should I be putting on the radio button validation ?
This is the portion I add
else if (test.indexOf('radio') != -1)
{
if(!val)errors += '- '+args+' is required.\n';

this is the whole function

function MM_validateForm() { //v4.0
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=MM_findObj(args);
if (val)
{
nm=val.name;
if ((val=val.value)!="")
{
if (test.indexOf('isEmail')!=-1)
{
p=val.indexOf('@');
if (p<1 || p==(val.length-1)) errors+='- '+nm+' must be a valid e-mail address.\n';
}
else if (test.indexOf('radio') != -1)
{
if(!val)errors += '- '+args+' is required.\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('Please correct your information:\n'+errors);
document.MM_returnValue = (errors == '');
}

Thanks

nawrioj

kaht · Mar 21, 2005

Radio buttons do not have a selectedIndex like dropdowns do. As far as I know, the only way to validate them is to loop thru and check to see if any are checked. Try something like this:

Code:

<script language=javascript>
function validateRadio() {
   radioGroup = document.forms["blahForm"].elements["blahRadio"];
   validRadio = false;
   for (i = 0; i < radioGroup.length; i++) {
      validRadio = (validRadio || radioGroup[i].checked);
   }
   if (!validRadio) {alert("you must select a radio button");}
}
</script>
<body>
<form name=blahForm>
<input type=radio name=blahRadio>1<br>
<input type=radio name=blahRadio>2<br>
<input type=radio name=blahRadio>3<br>
<input type=radio name=blahRadio>4<br>
<input type=radio name=blahRadio>5<br>
<input type=radio name=blahRadio>6<br>
<input type=radio name=blahRadio>7<br>
<input type=button value='validate radio' onclick='validateRadio()'>
</form>
</body>

-kaht

Do the chickens have large talons?

nawrioj · Mar 21, 2005

I need to validate the other input in the form. Can I do <form method="post" action="contact_thankyou.php" onSubmit="validateRadio();MM_validateForm('address','','R','city','','R','state','','R','zip','','R','fullname','','R','homephone','','R','heardaboutus','','R','interestarea','','R','permanent_injury','','Rradio','life_changed','','Rradio','economic_damage','','Rradio');return document.MM_returnValue"> ????

kaht · Mar 21, 2005

why not just put the contents of validateRadio() inside of MM_validateForm? Take out the part where you were originally trying to check for the radio button validation and replace it with the code that I provided in the function above.

-kaht

Do the chickens have large talons?

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radio button validation

nawrioj

Programmer

kaht

Programmer

nawrioj

Programmer

kaht

Programmer

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