Checkbox Validation

[Mighty]

Guys,

I have a page that has several checkboxes - all with the same name. How do I validate that at least one of them has been selected? I have tried looping through all the instance using "myform.country.length" - where country is the name of the checkboxes - but this doesn't work. Mighty

 

[SashiRaveendran]

<form name=frm onsubmit=&quot;return Check4Check()&quot; method=post>
<input type=checkbox name=&quot;check1&quot;><br>
<input type=checkbox name=&quot;check1&quot;><br>
<input type=checkbox name=&quot;check1&quot;><br>
<input type=checkbox name=&quot;check1&quot;><br>
<input type=checkbox name=&quot;check1&quot;><br>
<input type=submit>
</form>
<script>
function Check4Check()
{
var i = document.frm.check1.length;
for (j=0;j<i;j++)
{
alert(document.frm.check1(j).checked)
}
}
</script>

 

[kransom]

I think this js code may help you.

//use is the name of the checkboxes
var noOfEl = document.getElementsByName(&quot;use&quot
//loop through the checkboxes checking each one to
//see if it has been checked
for(var i=0;i<noOfEl.length;i++) {
if (noOfEl.checked) {
//do your other stuff here
}
}

 

[Boomerang]

try this:

<script language=&quot;javascript&quot;>

function checkboxLoop()
{
var sub1 = &quot;&quot;;
var total = &quot;&quot;;
var DM = document.MyF1;
var NrCbs = DM.country.length;

for (ia = parseInt(0); ia < NrCbs; ia++)
{
if (DM.country[ia].checked)
sub1 = sub1 + ' - ' + DM.country[ia].value;
}

if (!sub1 == &quot;&quot
{
total = &quot;these checkboxes are checked :&quot; + sub1;
alert(total);
}
else
{
alert(&quot;no checkboxes are selected&quot;
}
}


</script>

<form name=&quot;MyF1&quot;>
a: <INPUT TYPE=&quot;checkbox&quot; value=&quot;a&quot; name=&quot;country&quot;>
b: <INPUT TYPE=&quot;checkbox&quot; value=&quot;b&quot; name=&quot;country&quot;>
c: <INPUT TYPE=&quot;checkbox&quot; value=&quot;c&quot; name=&quot;country&quot;>
<br>
<input type=&quot;submit&quot; value=&quot;go&quot; name=&quot;submit777&quot; ONCLICK=&quot;checkboxLoop();return false;&quot;>
</form> <!-- My sport: Boomerang throwing !!
This year I will participate at the World Championships in Germany. (

http://www.boomerang2002.com)

!! Many Happy Returns !! -->

 

[Mighty]

Thanks for the pointers guys. It made me realise that my code was OK after all. I just had a lower case letter in my if statement instead of an upper case - so it couldn't locate the checkbox!! Mighty