javascript php functions

is illusory duty php controlling onsubmit javascript? someone give me an instance done?

function addorder(){
    $con = mysql_connect("localhost", "146687", "password");
    if(!$con){
        die('could connect: ' . mysql_error())
    }

    $sql = "insert orders ((user, 1st row, 2nd row, 3rd row, 4th row)
    values ($session->username,1st variable, 2nd variable, 3rd variable, 4th variable))";

    mysql_query($sql,$con)
    if(mysql_query($sql,$con)){
        relate "your method added";
    }else{
        relate "there an blunder adding your method databse: " . mysql_error();
    }
}

that's duty i am wanting call. the an organization system, form many any vigilant want, strike quarrel should supplement method table.