<?php
    include("header.php");
    print "<STYLE>body { font-family: georgia; }</STYLE>";

    // Validation begins
    if(!empty($submit))
    {
        $error = 0;

        // Check username. not allowed to leave it empty
        if(empty($username))
        {
            $usernameerr = "Please type your username<BR>";
            $error++;
        }
        // Check password. not allowed to leave it empty
        if(empty($password))
        {
            $passworderr = "Please type your password";
            $error++;
        }

        // If there's no error
        if($error == 0)
        {
            // compare what the user type in with the data in the database
            $result = mysql_query("select * from member where username = '$username' and password = '$password'");
            // if the data doesn't match
            if(mysql_num_rows($result) == 0)
            {
                $loginerr = "Username or password is incorrect. Please try again";
            }
            // if log in successfully, go to 'Home' page
            else
            {
                $data = mysql_fetch_array($result);
                session_register("MEMBERNAME");
                session_register("MEMBERID");
                $MEMBERNAME = $data["memberfname"];
                $MEMBERID = $data["memberid"];
                header("location: home.php");
            }
        }
    }

    print "<center>";
    // Menu bar
    print "<img src='pic/header.jpg' usemap='#Map'>";
    print "<map name='Map' id='Map'><area shape='rect' coords='32,-3,457,168' href='index.php' />";
    print "<area shape='rect' coords='524,37,624,67' href='howto.php' />";
    print "<area shape='rect' coords='655,89,756,120' href='contact.php' />";
    print "<area shape='rect' coords='720,21,822,53' href='aboutus.php' />";
    print "</map><BR>";

    print "<TABLE bordercolor='black' cellpadding='10' cellspacing='0' border='1'><TR><TD>";
    // Where error message is printed
    print "<center>$usernameerr $passworderr $loginerr</center>";

    // Log in form
    print "<FORM>";
    print "<img src='pic/loginlabel.jpg' align=absmiddle><img src='pic/usernamelabel.jpg' align=absmiddle>";
    print "<input type=text name=username value=$username>";
    print "<img src='pic/passwordlabel.jpg' align=absmiddle><input type=password name=password value=$password>&nbsp;&nbsp;";
    print "<input type=submit name=submit value=GO>&nbsp&nbsp<a href='register.php'><img src='pic/signupbutton.jpg' align=absmiddle></a>";
    print "</FORM></TABLE>";

    print "<img src='pic/instruction.jpg'>";

    // footer
    print "<img src='pic/footer.jpg'>";
    print "</center>";

?>