Checking a RadioButtonList

[iaswnidou]

Hello

I am trying to check if any radiobuttons of a radiobuttonlist's have been checked through this script:

var i=0;
var radiolist = document.forms[0].rdbTypeList;
for (i=0; i<=radiolist.length; i++)
  { 
  if (isNull(radiolist[i].checked))	
    {
     checked = true;
    }
  }
	  
if (checked == false)
{ alert("Property type is a required field."); }

At the isNull check i get an 'Object expected' runtime error. Could you help me with the script please?

 

[BillyRayPreachersSon]

Where have you defined your "isNull" function? If you have not defined one, that would explain the error.

If you want to test for something being null, you can use the standard "==" operator with the value "null" (not in quotes).

However, if all you want to do is see if one of a group is checked or not, you can do this:

var checked = false;
var radiolist = document.forms[0].elements['rdbTypeList'];
for (var i=0; i<=radiolist.length; i++) {
	if (radiolist[i].checked) {
		checked = true;
		break;
	}
}
if (!checked) alert("Property type is a required field.");

Hope this helps,
Dan

[tt]Dan's Page [blue]@[/blue] Code Couch

http://www.codecouch.com/dan/

[/tt]

 

[iaswnidou]

Thanks...i thought isNull was a supported function!

Now it's giving me 'checked' is null or not an object.

 

[BillyRayPreachersSon]

Change "i<=radiolist.length" to "i<radiolist.length"

Dan



[tt]Dan's Page [blue]@[/blue] Code Couch

http://www.codecouch.com/dan/

[/tt]

 

[iaswnidou]

Dan you're the man!