need help in putting style in if condition

Hi…

I need a condition in my webpage that if the LOGIN fields is [B]NULL[/B].
That row will be highlighted in RED.

i try this code but it did not work…

[code]
$LOGIN = $DTR->fields[‘LOGIN’];
if($LOGIN == NULL){
“<td style=’background-color:RED’>”;
//echo ‘<style = background-color: RED;>’.$DTR.'</style>’;
}
[/code]

I have this code:

[code]
<?php

include ‘config.php’;

$currentEmpID = $_SESSION[’empID’];

if(!isset($_POST[‘Regsubmit_’])){

$DATE1 = $_GET[‘Regfirstinput’];
$DATE2 = $_GET[‘Regsecondinput’];

$sql = “SELECT a.EMP_NO, CONCAT(LNAME, ‘, ‘ , FNAME, ‘ ‘, MI) AS FULLNAME, a.LOGIN, a.LOGOUT
FROM $ATTENDANCE.employee_attendance AS a LEFT JOIN $ADODB_DB.employment em ON a.EMP_NO = em.EMP_NO
LEFT JOIN $ADODB_DB.personal p ON em.EMP_ID = p.EMP_ID WHERE DATE(LOGIN) BETWEEN ‘$DATE1’ AND ‘$DATE2’
AND em.STATUS IN (‘Reg Operatives’, ‘Reg Staff ‘) OR LOGIN IS NULL”;

$DTR = $conn3->GetAll($sql);

$LOGIN = $DTR->fields[‘LOGIN’];

if($LOGIN == NULL){
“<td style=’background-color:RED’>”;
//echo ‘<style = background-color: RED;>’.$DTR.'</style>’;
}
$smarty->assign(‘attendance’, $DTR);

}
$smarty->display(‘header_att.tpl’);
$smarty->display(‘RegAttendance.tpl’);
$smarty->display(‘footer.tpl’);

?>
[/code]

[code]
<div id=”attendance” style=”width: 580px; height: 420px; overflow: auto; padding: 5px; top:95px”>
<fieldset>
<legend>Employee Attendance</legend>
<table border=”1″>
<tr>
<td colspan=”2″ style=”text-align:center”>Employee No</td>
<td colspan=”2″ style=”text-align:center”>Employee Name</td>
<td colspan=”2″ style=”text-align:center”>Time In</td>
<td colspan=”2″ style=”text-align:center”>Time Out</td>
</tr>

{section name=att loop=$attendance}
<tr>
<td colspan=”2″>{$attendance[att].EMP_NO}</td>
<td colspan=”2″>{$attendance[att].FULLNAME}</td>
<td colspan=”2″>{$attendance[att].LOGIN|date_format:”%d-%m-%Y %I:%M %p”}</td>
<td colspan=”2″>{$attendance[att].LOGOUT|date_format:”%d-%m-%Y %I:%M %p”}</td>
</tr>
{sectionelse}
<tr><td colspan=”1″>No DATA</td></tr>
{/section}
</table>
</fieldset>
</div>
[/code]

Thank you

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