script มันไม่ทำงานครับ ช่วยหน่อยครับ ติดมานานแล้วครับเปลี่ยนมาหลายวิธีแล้วครับ

if(parseFloat(txt1) < parseFloat(txt2))

<form name="form1" method="post" >
          <script type="text/javascript">  
 
function Checkinner(id){
                var loss,
                    weight    = parseInt(document.getElementById("weight"+id).value),
                    weightin  = parseInt(document.getElementById("weightin"+id).value),
                    weightout = parseInt(document.getElementById("weightout"+id).value);
                    
                console.debug(((weight > weightin) && (weightout > weightin)));
                console.debug([weight, weightin, weightout]);
               
                if((weight > weightin) && (weightout > weightin))
                {
                    loss = ((weightin / weightout) / weight) * 100;
                    document.getElementById("loss"+id).value = loss;
                } else {
                    console.debug('xxxxxxxxxxxxxxxxxxxxxxxxxx.');
                    return false;
                }
                
}
        
</script>
<table width="833" border="1" align="center">
            <tr>
              <td width="85" align="center">น้ำหนัก</td>
              <td width="91" align="center">น้ำหนักเข้า</td>
              <td width="75" align="center">น้ำหนักout</td>
              <td width="54" align="center">loss</td>
            </tr>
                          <? $a=0;
                          $nc =2;
                          $max =$nc;
                          ?>
                           <input type="hidden" id="max_id" value="<?=$max?>" />
                          <?
                                                        for($i=0;$i<$nc;$i++){
                                                        ?>
            <tr>
              <td width="85" align="center">
                          <input type="text" name ="weight[]" id ="weight<?=$a?>" value ="10" size="8"/ readonly="readonly"></td>
              <td width="91" align="center"><input type="text" name ="weightin[]"  id ="weightin<?=$a?>" size="3" maxlength="5" onchange="Checkinner('<?=$a?>');" 
                                onkeypress='if (event.keyCode&lt;48||event.keyCode&gt;59)event.returnValue=false'/></td>
              <td width="75" align="center">    <input type="text" name ="weightout[]"  id ="weightout<?=$a?>" size="3" maxlength="5" onchange="Checkinner('<?=$a?>');"
                                onkeypress='if (event.keyCode<48||event.keyCode>59)event.returnValue=false'/></td>
              <td width="54" align="center"><input name ="loss[]" type="text" id="loss<?=$a?>" size="9" readonly ="readonly" /></td>
            </tr>
                        <?
                                $a++;
                        }?>
  </table>
</form>