checking checkbox array values

Hi All,

I have only single checkbox(array) inside a form.This checkbox is moving under a loop.so it should be del[0]–>32,del[1]–>56…..and so on.

I want to check the values wether they are coming or not.
Here is my code:

<form>
<input type=”checkbox” name=”del[]” value=”<?=$pid;?>”>
</form>

if the value is empty then i want to throw a alert to select the check boxes first.But here the values are coming in an array.Thats the problem.

I just need to check the array values using a javascript funtion.

Please guide me.Thanks in advance for your co-operation..

Luv……..Raj

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