ok, i guess I need help ! I searched with every keyword I could think off, but I still cant figure out, please help. Am more of a php guy, and I\'ve just started with jQuery
Try setting the dataType option:
$.post('myCalculator.php' ,{qid:itemID},function(response)
{
$("div.calculation_value").show(500).html(response['calculatedValue']);
$("div#message_for_user").show(500).html(response['message']);
}, 'json');
NB I have also added the closing brackets ) where you have missed them.