I need to highlight every Friday in this time table just like this one http://moskeebadr.nl/index.php/gebedstijden for example as you can see they have highlighted every friday
my html
<!DOCTYPE html>
<html>
<head>
<title> Monthly Prayer Timetable </title>
<style>
body, tr, form {font-family: tahoma; font-size: 12px; color: #404040; text-align: center; margin: 0; padding: 0}
pre {font-family: courier, serif, size: 10pt; margin: 0px 8px;}
input {font-size: 12px;}
.header {background:#eef; border-bottom: 1px solid #ddd; padding: 7px;}
.caption {font-size: 20px; color: #d95722; text-align: center; width: 10em;}
.arrow {font-weight: bold; text-decoration: none; color: #3D3D3D; }
.arrow:hover {text-decoration: underline;}
.command {font-weight: bold; text-decoration: none; color: #AAAAAA; }
.command:hover {text-decoration: underline;}
.timetable {border-width: 1px; border-style: outset; border-collapse: collapse; border-color: gray; margin: 0 auto;}
.timetable td {border-width: 1px; border-spacing: 1px; padding: 1px; border-style: inset; border-color: #CCCCCC;}
.head-row {color: black; background-color: #eef;}
.today-row {background-color: #F8F7F4; color: black}
</style>
</head>
<body>
<script type="text/javascript" src="PrayTimes.js"></script>
<div class="header">
<form class="form" action="javascript:update();">
Location:
<select id="location" size="1" style="font-size: 12px;" onchange="update();">
<option value="52.379189:4.899431:+01" selected="selected">Amsterdam</option>
<option value="33.4484:-112.0740:-07">Phoenix</option>
<option value="40.748817:-73.985428:-05">New York</option>
</select>
DST:
<select id="dst" size="1" style="font-size: 12px;" onchange="update()">
<option value="auto" selected="selected">Auto</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
Method:
<select id="method" size="1" style="font-size: 12px;" onchange="update()">
<option value="MWL" selected="selected">Muslim World League (MWL)</option>
<option value="ISNA">Islamic Society of North America (ISNA)</option>
<option value="Egypt">Egyptian General Authority of Survey</option>
<option value="Makkah">Umm al-Qura University, Makkah</option>
<option value="Karachi">University of Islamic Sciences, Karachi</option>
<option value="Jafari">Shia Ithna-Ashari (Jafari)</option>
<option value="Tehran">Institute of Geophysics, University of Tehran</option>
</select>
</form>
</div>
<br/>
<table align="center">
<tr>
<td><a href="javascript:displayMonth(-1)" class="arrow"><<</a></td>
<td id="table-title" class="caption"></td>
<td><a href="javascript:displayMonth(+1)" class="arrow">>></a></td>
</tr>
</table>
<br/>
<table id="timetable" class="timetable">
<tbody></tbody>
</table>
<div align="center" style="margin-top: 7px">
Source: <a href="http://praytimes.org/" class="command">PrayTimes.org</a> |
Time Format: <a id="time-format" href="javascript:switchFormat(1)" title="Change clock format" class="command"></a>
</div>
<br/>
<script type="text/javascript">
var currentDate = new Date();
var timeFormat = 1;
switchFormat(0);
// display monthly timetable
function displayMonth(offset) {
var details = [];
var val = document.getElementById("location").value;
details = val.split(":");
var lat = details[0];
var lng = details[1];
var timeZone = details[2];
var dst = $('dst').value;
var method = $('method').value;
prayTimes.setMethod(method);
currentDate.setMonth(currentDate.getMonth()+ 1* offset);
var month = currentDate.getMonth();
var year = currentDate.getFullYear();
var title = monthFullName(month)+ ' '+ year;
$('table-title').innerHTML = title;
makeTable(year, month, lat, lng, timeZone, dst);
}
// make monthly timetable
function makeTable(year, month, lat, lng, timeZone, dst) {
var items = {day: 'Day', fajr: 'Fajr', sunrise: 'Sunrise',
dhuhr: 'Dhuhr', asr: 'Asr', // sunset: 'Sunset',
maghrib: 'Maghrib', isha: 'Isha'};
var tbody = document.createElement('tbody');
tbody.appendChild(makeTableRow(items, items, 'head-row'));
var date = new Date(year, month, 1);
var endDate = new Date(year, month+ 1, 1);
var format = timeFormat ? '24h' : '12hNS';
while (date < endDate) {
var times = prayTimes.getTimes(date, [lat, lng], timeZone, dst, format);
times.day = date.getDate();
var today = new Date();
var isToday = (date.getMonth() == today.getMonth()) && (date.getDate() == today.getDate());
var klass = isToday ? 'today-row' : '';
tbody.appendChild(makeTableRow(times, items, klass));
date.setDate(date.getDate()+ 1); // next day
}
removeAllChild($('timetable'));
$('timetable').appendChild(tbody);
}
// make a table row
function makeTableRow(data, items, klass) {
var row = document.createElement('tr');
for (var i in items) {
var cell = document.createElement('td');
cell.innerHTML = data[i];
cell.style.width = i=='day' ? '2.5em' : '3.7em';
row.appendChild(cell);
}
row.className = klass;
return row;
}
// remove all children of a node
function removeAllChild(node) {
if (node == undefined || node == null)
return;
while (node.firstChild)
node.removeChild(node.firstChild);
}
// switch time format
function switchFormat(offset) {
var formats = ['12-hour', '24-hour'];
timeFormat = (timeFormat+ offset)% 2;
$('time-format').innerHTML = formats[timeFormat];
update();
}
// update table
function update() {
displayMonth(0);
}
// return month full name
function monthFullName(month) {
var monthName = new Array('January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December');
return monthName[month];
}
function $(id) {
return document.getElementById(id);
}
</script>
</body>
</html>
and the javascript that is used for the time table.
http://praytimes.org/code/v2/js/PrayTimes.js
any idea what i should be editing to make this work.