How to delete row from mysql using php and javascript

How to delete row from mysql using php and javascript

I am trying to delete the entire row using the php code.
But before that my page has a multiple rows ended with radio button before
clicking delete button we have to select anyone of the radio button, then
we can click on delete.
but what i want is, i have written a java-script code that gets the radio
button value and after that i want to get that javascript variable value
to php code and then execute the delete command..
Here is what i have tried
code javascript
<script>
function getResults() {
var radios = document.getElementsByName("address");
for (var i = 0; i < radios.length; i++) {
if (radios[i].checked) {
var a = radios[i].value
alert(a);
break;
}
}
</script>
php code:
<?php
$_GET['a']
mysql_connect("localhost", "tiger", "tiger") or die (mysql_error ());
mysql_select_db("theaterdb") or die(mysql_error());
$strSQL =("DELETE FROM theater WHERE theater_name='"$_POST["a"]"'");
$rs = mysql_query($strSQL);
mysql_close();
?>
}
But this is not working