php $_get variable gone after submitting form - php

Question

my problem goes like this:
my home page has tables with rows pulled from the database (while loops)
each row has a - cell in which he can add an event to that specific row
in order to do that i send the row id as a $_GET variable from the home page table
and in the "add event" page i store it as a variable
but when i submit my addevent form without filling it properly (as i coded) it simply refreshes the form only without the row id in the url therefor also the query i do in the beginning of the page for pulling the row data can no longer execute and that pops a PHP error
for the id variable which i sign it the $_GET and the query (mysql fetch array).
also of course all the data which i display in the form from that query is gone.
any suggestions on how to approach this ? thanks in advance, Regards.
EDIT:** kill the new guy! -Sorry i guess
home page where i send the id :
$sql = "SELECT * FROM alarms WHERE alarmstatus = 'OFF' and starttime='::' ORDER BY clientid ASC";
$query = mysql_query($sql);
echo "<table cellpadding='1px' border='1px' bordercolor='#0066FF' cellspacing='0'>
<form action='hpage.php' method='get'>";
while($fetch = mysql_fetch_array($query)) {
echo "<tr>
<td>
".$fetch['clientid']."</td>
<td>".$fetch['controller']."</td>
<td>".$fetch['typeid']."</td>
<td style='color: red'>".$fetch['alarmstatus']."</td>
<td>".$fetch['starttime']."</td>
<td>".$fetch['endtime']."</td>
<td><a href='includes/editalarm.php?id=".$fetch['id']."'>Edit</a></td>
<td><a href='includes/addevent.php?id=".$fetch['id']."'>Add event</a></td>
<td><a href='includes/deletealarm.php?id=".$fetch['id']."'>Delete</a></td>
</tr>";
}
the add event where i get the variable and make the query:
$alarmid = $_GET['id'];
$sql = "SELECT * FROM alarms WHERE id=".$alarmid;
$query = mysql_query($sql);
$fetch = mysql_fetch_array($query);
?>
the form:
<table cellpadding="2px" cellspacing="0" >
<form action="addevent.php" method="post">
<tr>
<td>סניף:</td>
<td><input style="width:200px; background-color: #d6d6d6;" readonly name="client" value="<?php echo $fetch['clientid']; ?>" /></td>
</tr>
<tr>
<td>בקר:</td>
<td><input style="width:200px; background-color: #d6d6d6;" readonly name="controller" value="<?php echo $fetch['controller']; ?>" /></td>
</tr>
<tr>
<td>אזעקה:</td>
<td><input style="width:200px; background-color: #d6d6d6;" readonly name="controller" value="<?php echo $fetch['typeid']; ?>" /></td>
</tr>
<tr>
<td>מוקדן:</td>
<td>
<?php
$sql = "SELECT * FROM users WHERE privilege = '2'";
$query = mysql_query($sql);
echo "<select name='user' style='width:207px;'>";
echo "<option>..</option>";
while ($fetch2 = mysql_fetch_array($query)){
echo "<option>".$fetch2['username']."</option>";
}
echo "</select>";
?>
</td>
</tr>
<tr>
<td>איש קשר:</td>
<td><input type="text" name="contact" /></td>
</tr>
<tr>
<td>הודעה:</td>
<td><input type="text" style="width:200px; height:100px" name="message" /></td>
</tr>
<tr>
<td>תשובה:</td>
<td><input type="text" style="width:200px; height:100px" name="answer" /></td>
</tr>
<tr>
<td>שעה:</td>
<td>
<select name="eventhour">
<option value ="default"></option>
<?php
for($i = 0; $i<60; $i++){
$value = $i;
if($i<=9){
$value= "0".$i;
}
echo "<option>".$value."</option>";
}
?>
</select>
<select name="eventminute">
<option value ="default"></option>
<?php
for($i = 0; $i<24; $i++){
$value = $i;
if($i<=9){
$value= "0".$i;
}
echo "<option>".$value."</option>";
}
?>
</select>
</td>
</tr>
<tr>
<td>
<input type="submit" name="save" value="שמור" />
<input type="submit" name="cancell" value="בטל" />
</td>
<td></td>
</tr>
</form>

Answer 1

Your form action is POST. If you change that to GET then you will have the form as $_GET.