CHECKBOX_MULTIPLE ENTRIES IN DATABASE

hello,
please help me on this one. i have been stuck on it since two days.
i have checkboxes and i want to pass multiple entries in the database table.
GROUP TYPE : <INPUT type="checkbox" name="groupID" value="1" <? echo $gflag;?>>STUDENT
<INPUT type="checkbox" name="groupID" value="2" <? echo $gflag2;?>>PROFESSOR
<INPUT type="checkbox" name="groupID" value="3" <? echo $gflag3;?>>VISITING FACULTY

Now i want that if the user checks more than one accordingly my table should get updated.
please help me. do i need to use java script???
thanks

At first look, I would say that you need to have different "names" on your check boxes. I'm not sure of the order, but You're either getting a form variable "groupID" = 1 or "groupID" = 3. If you don't want to let them be a student "and" a professor, then you'll probably want to use radio buttons.

You should have a submit button below your checkboxes that sends the form contents to a script that updates the database, e.g.

<form action="update.php" method="post">
<input type="checkbox" name="check1" value="1"> Student<br>
<input type="checkbox" name="check2" value="1"> Professor<br>
.
.
.
<input type="submit" value="Update!">
</form>

if you want to update the DB without having to hit a button, you must use javascript.