[มือใหม่มากๆ]มีปัญหาการใช้งานระบบปฎิทินคร้าบ ช่วยผมด้วย

<?PHP

?>

<td colspan=7 align=center><a href=\"javascript:d_s($mon,'m')\"><</a>&nbsp;$year_view - 
$mon_view <a href=\"javascript:d_s($mon,'p')\">></a></td>

<style type="text/css">
<!--
body { margin: 0px 0px; padding: 0px 0px}
a:link { color: #005CA2; text-decoration: none}
a:visited { color: #005CA2; text-decoration: none}
a:active { color: #0099FF; text-decoration: underline}
a:hover { color: #0099FF; text-decoration: underline}
-->
</style>

<form id="form1" name="form1" method="post" action="">
<table width="0" border="0" cellpadding="1" cellspacing="1">
<tr>
<td bgcolor="f2f2f2"><div align="center"><font color="#0000FF" style="font-family:sans-serif" 
size="+6">
<?php
$a= date('j'); // , 1 to 31 
$b = date('a'); // am,
$c = date('A'); // AM,
$d = date('B'); // Swatch Internet time 000 -999
$e = date('d'); // , 01 to 31
$f = date('D'); // , sat 
$g = date('F'); // , November 
$h = date('g'); // , 1 through 12
$hh = date('G'); // , 0 through 23
$i = date('h'); // , 01 through 12 
$j = date('H'); // , 00 through 23 
$k = date('i'); // , 00 to 59 
$l = date('I'); // 0, 1 if Daylight Savings Time, 0 otherwise. 
$m = date('l'); // , Sunday through Saturday
$n = date('L'); // 0, 1 if it is a leap year, 0 otherwise.
$o = date('m'); // , 01 through 12
$p = date('M'); // , Jan through Dec
$q = date('n'); // , 1 through 12
$r = date('o'); // Example: +0200 
$s = date('r'); // Example: Thu, 21 Dec 2000 16:01:07 +0200
$t = date('s'); // 00 through 59
$u = date('S'); // st, nd, rd or th. Works well with j 
$v = date('t'); // 28 through 31
$w = date('T'); // time zoneseting Examples: EST, MDT ...
$x = date('u'); // See also time()
$y = date('w'); // 0 (for Sunday) through 6 (for Saturday)
$z = date('W'); // Example: 42 (the 42nd week in the year)
$aa = date('y'); // Examples: 99 or 03
$bb = date('Y'); // Examples: 1999 or 2003
$cc = date('z'); 
$dd = date('Z'); 
$mon=0;
if(!$mon){
$mon = $o ;
}else{-
$mon = $mon ;
}
$year=0;
if(!$year){
$year = $bb ;
}else{
$year = $year;
}
$firstday = mktime(0,0,0,$mon,1,$bb);
$firstdays = date('w',$firstday); 
$lastdays = date('t',$firstday); 
$year_view = date('Y',$firstday); 
$mon_view = date('m',$firstday); 
echo"
<script>
function d_s( su , mnp){ 
if(mnp == 'm'){
document.dat_form.mon.value = su - 1 ;
}else{
document.dat_form.mon.value = su + 1 ;
}
document.dat_form.submit();
}
</script>
<form name=dat_form action={$_SERVER['PHP_SELF']} method=post>
<input type=hidden name=mon value=''>

<table border=1 width=140 cellpadding=0 cellspacing=0 bordercolor=#999999>
<tr bgcolor=pink>
<td colspan=7 align=center><a href=\"javascript:d_s($mon,'m')\"><</a>&nbsp;$year_view - 
$mon_view <a href=\"javascript:d_s($mon,'p')\">></a></td>
</tr>
</form>
<tr align=center><td><font color=red>อา</a></td><td>จ</td><td>อ</td><td>พ</td><td>
พฤ</td><td>ศ</td><td><font color=blue>ส</font></td></tr>
<tr align=right>";
//// 
for($i = 0; $i < 7 ; $i++){
if($firstdays == $i){
break;
}
else{
echo"<td width=8>&nbsp;</td>";
}
$week=0; 
}

for($i=1; $i<=$lastdays ;$i++){
if($week % 7 == 0){
echo"</tr><tr align=right>";
}
if($a == $i){ 
$bgcolor = "bgcolor=pink";
}else{
$bgcolor = '';
}

if($week%7==0){ 
echo"<td $bgcolor><font size=2 color=red><a href=\"calendar.php?test=$i/$mon_view/$year_view\">$i</a></font></td>";
}else if($week%7==6){ 
echo"<td $bgcolor><font size=2 color=blue><a href=\"calendar.php?test=$i/$mon_view/$year_view\">$i</a></font></td>";
}else{ // 
echo"<td $bgcolor><font size=2><a href=\"calendar.php?test=$i/$mon_view/$year_view\">$i</a></font></td>";
}
$week++;
}

while($week%7!=0){
echo"<td>&nbsp;</td>";
$week++;
}
echo"</tr>
</table>
";
?>
</font></div></td>
<td bgcolor="f2f2f2"><div align="center">เลือกวันที่ต้องการบันทึกตารางนัด</div></td>
</tr>
<tr>
<td bgcolor="f2f2f2"></td>
<td bgcolor="f2f2f2"><img name="" src="" width="250" height="2" alt="ห" /></td>
</tr>
<tr>
<td bgcolor="f2f2f2">วัน/เดือน/ปี</td>
<td bgcolor="f2f2f2"><label>
<input name="textfield" type="text" value="<? echo $test; ?>" />
</label></td>
</tr>
<tr>
<td bgcolor="f2f2f2">เรื่อง</td>
<td bgcolor="f2f2f2"><label>
<input type="text" name="textfield2" />
</label></td>
</tr>
<tr>
<td valign="top" bgcolor="f2f2f2">รายระเอียด</td>
<td bgcolor="f2f2f2"><label>
<textarea name="textarea" cols="50" rows="5" wrap="virtual"></textarea>
</label></td>
</tr>
<tr>
<td bgcolor="f2f2f2">&nbsp;</td>
<td bgcolor="f2f2f2"><label>
<div align="center">
<input type="submit" name="Submit" value="บันทึก" />
</div>
</label></td>
</tr>
</table>
</form>