you have to use $_REQUEST instead of $_POST because $_REQUEST support for both method$_POST AND $_GET .
if still problem the use
print_r($_REQUEST);
it show you all the parameters which send on...

yes their is the same way to like upload images as well upload file on the server you have to get the properties of the file
list($width, $height, $type, $attr) =...

nice post
<URL SNIPPED>xperts

But i suggest you to do this in php. coz php is easy to use and its hosting servers are also in cheap prieces. else
Simply visit any school and get their requirement.
Regards.
<URL SNIPPED>xperts

this means there is some problem in your javascript. when the first time the javascript called its check and an javascript error occur and when you click again then the existing error return true to...