สอบถามวิธีทำ php กับ java scrip แบบว่าคลิกในช่องของตารางแล้ว ให้ค่า alert ประจำเลขในตารางออกมาครับ

<?
function valueinput()
{
$input=4;
$input2=4;
echo $input3=$input2/2;
echo $input4=$input3+1;echo "<br>";
echo $input5=(int)floor($input3);
echo $input6=ceil($input4);echo "<br>";
echo $input51=$input5+1;

if($input%2==0){

echo "<table border=2>";

for($tr=1;$tr<=$input;$tr++)
{
		echo "<tr>";
		for($td=1;$td<=$input2;$td++)
		{
			if($tr==$input3 and $td==$input3)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo '<a onclick=myFunction()>';
				echo $tr." , ".$td;
				echo '</a>';
				global $r,$d;
				$r=$tr;
				$d=$td;
				echo "</td>";	
			}
			else if($tr==$input3 and $td==$input4)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				//echo $tr." , ".$td;
				echo "</td>";			
			}
			else if($tr==$input4 and $td==$input3)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input4 and $td==$input4)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else{


			//echo "<td bgcolor=#C0C0C0>";
			echo "<td>";
			echo $tr." , ".$td;
			echo "</td>";
			}
		}
		echo "</tr>";
}


echo "</table>";
}//close if($input%2==0)


//----------------------------------------------------------------------------------------------------
else{
echo "<table border=2>";
for($tr=1;$tr<=$input;$tr++)
{
		echo "<tr>";
		for($td=1;$td<=$input2;$td++)
		{
			if($tr==$input5 and $td==$input5)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input5 and $td==$input51)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input5 and $td==$input6)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input51 and $td==$input5)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input51 and $td==$input51)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input51 and $td==$input6)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input6 and $td==$input5)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input6 and $td==$input51)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else if($tr==$input6 and $td==$input6)
			{
				echo "<td bgcolor=#C0C0C0>";
				echo $tr." , ".$td;
				echo "</td>";
			}
			else
			{
				echo "<td>";
				echo $tr." , ".$td;
				echo "</td>";
			}
		}
		echo "</tr>";
}


echo "</table>";


}//close else if($input%2==0)





}//close function



echo valueinput();
echo "<hr>";



?>

<script type="text/javascript">  
function myFunction()
{
var u_score=<?=$r?>;
var u_scorere2=<?=$d?>;

alert(""+u_score+" , "+u_score2 );  
}
</script>