<script>
    function sub()
    {
    alert("coming");
    var a= new Array;
    <?php
    $dbhost ='localhost';
    $dbuser = 'root';
    $dbpass = '';
    $dbname = 'pupilcafe';
    $conn = mysql_connect($dbhost,$dbuser,$dbpass) or die ('Error Connecting to mysql');
    mysql_select_db($dbname,$conn);
    $uid=1;
    $semester='1stSemester';
    $cid=1;
    $qry="select * from subject where cid='$cid'&& uid='$uid'&& semester='$semester'";
    $res = mysql_query($qry);
    while($data=mysql_fetch_row($res))
    {
    $i=0;
    echo "a[$i]=c'".$data[1]."';";
    $i++;
    }
    ?>
alert(a[0]);
}
</script>