Not able to login - help me disable admin check in the code below

[arunkr]

<?php

session_start( );

include_once( dirname( __FILE__ )."/../inc/func/get_sth.php" );

include_once( _ABSPATH_."/inc/func/header.php" );

if ( $_GET["f"] == "login" )

{

    $adminuser = strtolower( strip_tags( trim( $_POST["adminuser"] ) ) );

    $r_0 = strtolower( strip_tags( trim( $_SESSION["r"] ) ) );

    $r_1 = strtolower( strip_tags( trim( $_POST["r"] ) ) );

    if ( $r_0 == $r_1 )

    {

        $result = mysql_query( "SELECT password FROM admin where adminuser='".$adminuser."'" );

        $val = mysql_fetch_array( $result );

        if ( !$val["password"] )

        {

            $loginfail = 1;

        }

        else

        {

            if ( $val[password] === md5( $_POST["password"] ) )

            {

                $_SESSION['admin'] = $adminuser;

                header( "Location: ./" );

                exit( );

            }

            $loginfail = 1;

        }

    }

    else

    {

        $loginfail = 2;

    }

}

$page_title = l( "Administration Login" )." | ".get_sitename( );

$smarty->assign( "page_title", $page_title );

$smarty->assign( "loginfail", $loginfail );

$smarty->display( "mgt/login.tpl" );

?>

[arunkr]

Login.tpl

 

 

<form id="form1" name="form1" method="post" action="?f=login">

  <table width="100%" border="0" cellspacing="5">

    <tr>

      <td width="45%" height="50" align="right" valign="bottom">{l t='Admin User'}</td>

      <td valign="bottom"><label>

        <input type="text" name="adminuser" id="adminuser" value="{$smarty.post.adminuser}" />

      </label></td>

    </tr>

    <tr>

      <td width="45%" height="40" align="right" valign="bottom">{l t='Password'}</td>

      <td valign="bottom"><input type="password" name="password" id="password"  value="{$smarty.post.password}"/></td>

    </tr>

    <tr>

      <td height="41" align="right" valign="bottom">{l t='Secure Code'}</td>

      <td valign="bottom"><input type="input" name="r" id="r" style="width:50px;" /> <img src="auth_img.php" /></td>

    </tr>

    <tr>

      <td></td>

      <td><div style="float:left; margin:0 auto;background-color:#FF9; color:red; font-weight:bold; display:{if $loginfail!=1}none{/if}">Invalid Username or Password!

      </div>

      <div style="float:left; margin:0 auto;background-color:#FF9; color:red; font-weight:bold; display:{if $loginfail!=2}none{/if}">Invalid Secure Code!

      </div></td>

    </tr>

    <tr>

      <td height="80" colspan="2" align="center" valign="center"><label>

        <input type="submit" name="button" id="button" value="    {l t='Log in'}    " />

      </label></td>

    </tr>

  </table>

</form>

[Rifts]

do you have a database set up?

 

also if you have access to these files dont you have access to the admin login