อยากถามเกี่ยวกับ value ใน checkbox ค่ะ value ใน checkboxนี้สามารถเก็บได้หลายค่ามั้ยคะ

  <p><font size="2" face="Tahoma">
    <textarea name="species" cols="50" rows="7" wrap="physical" id="species">List of Species</textarea>
  </font></p>
  <p><font size="2" face="Tahoma">&nbsp;
    <?php 
			require "conn.inc.php";
			$sqlgetsp= "select distinct(Marine_species.msname), code from SPCatch_of_marine inner join Marine_species on (SPCatch_of_marine.code = Marine_species.code_no) order by msname asc";
			$qrygetsp= mysql_query($sqlgetsp); 
			$numgetsp = mysql_num_rows($qrygetsp);
	 	     //echo $numgetsp ;
			  for($j=1;$j<=$numgetsp;$j++)
			  {
			$resgetsp = mysql_fetch_array($qrygetsp);
			$sp_msname = $resgetsp[msname];
			//echo "<font color='#1780D5' font-family='tahoma' size='2'>".$sp_msname."</font>";
			}
			?>
    <input type="checkbox" name="allsp[]" value="<?php echo $sp_msname; ?>" id="allsp" onclick="document.getElementById('species').value=document.getElementById('species').value+'\n'+document.getElementById('allsp').value" class="allsp-default" />
    <font color="#1780D5" size="2" face="Tahoma">All species</font></font></p>