Radio Button Validation ?

[ainoy31]

I need to validate that a selection has been made upon updating a record.  I am using a radio button.  Here is the code for the radio button:

 

<td><font face = "Ariel, Helvetica, sans-serif"><input type = "radio" name = "t_id" value = "<? echo $t_id; ?>"></font></td>

<td align = "center"><font face = "Ariel, Helvetica, sans-serif"><? echo $fl_num; ?></font></td>

<td align = "center"><font face = "Ariel, Helvetica, sans-serif"><? echo $fl_date; ?></font></td>

<td align = "center"><font face = "Ariel, Helvetica, sans-serif"><? echo $fl_time; ?></font></td>

<td align = "center"><font face = "Ariel, Helvetica, sans-serif"><? echo $de_port; ?></font></td>

 

This is the code I am trying to use and get it to work but no luck.

 

function hasASelection()

{

var elms = document.getElementsByName(t_id);

for(var k=0, elm;elm=elms[k];k++)

if(elm.checked)

{

return true;

}

return false;

}

[mpharo]

If you wrap it in a <form> you can validate it by checking if $_POST['t_id'] is intialized or not...

[deadimp]

Well, this is kind of a PHP forum, but...

You need a little more checking around that element, because a text field won't have a variable named 'checked', so that could create problems further down the road.

function hasASelection() {
var list=document.getElementsByName(t_id);
for (k in list) {
  cur=list[k];
  if (cur.tagName=="INPUT" && cur.type=="radio" && cur.checked) return true;
}
return false;
}

Though, I'm not sure what entirely this acheives, since by default you should have one radio enabled. By the looks of it, you only have one.