Event.observe(window, 'load', init, false);

function init () { 
	Event.observe('productvariation', 'change', sendData, false);
}
	
function sendData() {
	var url = '/pages/productvari.php';
	var pars = $('productvariation').serialize();	
 
  
	 var target = 'status'; 
	var myAjax = new Ajax.Updater(target, url, { method: 'POST', parameters: pars});
}