ขอเอาเรื่องที่ยังทำไม่ได้มา ถามอีกทีครับ รบกวนด้วยครับ

<?php


<?  
	include "connect/connect.php";
	$sql = "select * from $tb where $tb.id_group = '$group_search'   order by $tb.id_no asc ";
	$dbquery = mysql_db_query($db, $sql); 
	$num_rows = mysql_num_rows($dbquery);
	if ($num_rows<1) {echo "";}
	$i=0;
	while ($i<$num_rows){
	$result=mysql_fetch_array($dbquery);
	$id_no=$result[id_no];
	$pname=$result[pname];
	$name=$result[name];
?>

<script language="javascript">
var obj= document.all;
	function sum(){
	obj.t3.value=parseInt(obj.t1.value)+parseInt(obj.t2.value);
	 if ((!obj.t1.value)||(!obj.t2.value))
	{ 
	obj.t4.value='-';
	}
	else if (obj.t3.value>100)
	{ 
	obj.t4.value='Error';
	 }
	else if ((obj.t3.value>=obj.a1.value)||(obj.t3.value==100))
	{ 
	obj.t4.value='A';
	}
	else if ((obj.t3.value>=obj.b1.value)&&(obj.t3.value<=obj.b2.value))
	{ 
	obj.t4.value='B+';
	}
	else if ((obj.t3.value>=obj.b3.value)&&(obj.t3.value<=obj.b4.value))
	{ 
	obj.t4.value='B';
	}
	else if ((obj.t3.value>=obj.c1.value)&&(obj.t3.value<=obj.c2.value))
	{
	 obj.t4.value='C+';
	}
	else if ((obj.t3.value>=obj.c3.value)&&(obj.t3.value<=obj.c4.value))
	{
	obj.t4.value='C';
	}
	else if ((obj.t3.value>=obj.d1.value)&&(obj.t3.value<=obj.d2.value))
	{
	 obj.t4.value='D+';
	 }
	else if ((obj.t3.value>=obj.d3.value)&&(obj.t3.value<=obj.d4.value))
	{
	 obj.t4.value='D';
	}
	else if (obj.t3.value<=obj.e2.value)
	{
	 obj.t4.value='E';
	 }
	}
   </script>	

  <? echo "$id_no   $pname  $name; "?>
   <input name="t1[]" type="text" id="t1" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" size="2" maxlength="2"/>
   <input name="t2[]" type="text" id="t2" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" size="2" maxlength="2" />
   <input name="t3[]" type="text" id="t3" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()"  size="3" maxlength="3"/>
   <input name="t4[]" type="text" id="t4" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" size="1"/>
	   
<? $i++; }  ?>


  <input name="a1" type="text" id="a1" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="800" size="1" maxlength="3"/>
-100 <br> 
  <input name="b1" type="text" id="b1" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="75" size="1" maxlength="2"/>
- <input name="b2" type="text" id="b2" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="79" size="1" maxlength="2"/>
  <br>
  <input name="b3" type="text" id="b3" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="70" size="1" maxlength="2"/>
- <input name="b4" type="text" id="b4" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="74" size="1" maxlength="2"/>
  <br>
  <input name="c1" type="text" id="c1" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="65" size="1" maxlength="2"/>
- <input name="c2" type="text" id="c2" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="69" size="1" maxlength="2"/>
   <br>                          
    <input name="c3" type="text" id="c3" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="60" size="1" maxlength="2"/>
-  <input name="c4" type="text" id="c4" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="64" size="1" maxlength="2"/>
    <br>
    <input name="d1" type="text" id="d1" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="55" size="1" maxlength="2"/>
-  <input name="d2" type="text" id="d2" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="59" size="1" maxlength="2"/>
     <br>
    <input name="d3" type="text" id="d3" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="50" size="1" maxlength="2"/>
-  <input name="d4" type="text" id="d4" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="54" size="1" maxlength="2"/>
    <br>  
     0 - <input name="e2" type="text" id="e2" onFocus="sum()" onBlur="sum()" onChange="sum()" onKeyUp="sum()" value="49" size="1" maxlength="2"/>

?>