PHP javascript: Output div with echo to get value, how to solve

PHP javascript: Output div with echo to get value
Above is reading data from the data
Here is the output div
echo "";
echo "B:". $row ["B"];
?>


Why would undefine?????
Thank you!!
------to solve the idea----------------------
Try W.getattribute ("value") to see
------to solve the idea----------------------
The. Value property is for input, you must not use Div, if it is W.getattribute ("value") should be able to get the value of div.
------to solve the idea----------------------
You can change that.

 
 $row [' xxx '] = 100;
$row [' b '] = 1;
echo "click";
echo "B:". $row ["B"];
?>

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