Delete Selected Checkbox items from the database. HELP

[eluser]basty_dread[/eluser]
How could I delete the selected checkbox with coresponding value from the database?
Anyone please help me. Thank you very much.

here is my code for the checkbox
i wonder how could i know the checked items and then Delete the items from the database

Code:

<form name="form1">
<?
for($i = 0; $i < sizeof($primeno); $i++){

?&gt;
&lt;input type="checkbox" name="rdindex1" value="&lt;?=$primeno[$i];?&gt;"/&gt;

&lt;?
}
?&gt;

&lt;input type="submit" name="delete" value="Delete Selected"&gt;
&lt;/form&gt;