/* =====================================================================
 * 				SPECIAL OFFER JAVASCRIPT FUNCTIONS
   ===================================================================== */


// checks if Special Offer should be displayed
// it compares selected plan value with special offer value
// and only smaller upgrades benefit from special offer
function special_offer_check(special_offer_plan_id)
{
	var f = document.modify; 
	var field = f.payment_plan;

	if (!special_offer_plan_id)
		return false;		

	var selected_plan_id = 0;
	
	// get selected plan	
	for (i=1; i<field.length; i++)				// starting from 1 as first plan is Free 
	if (field[i].checked)
		selected_plan_id = field[i].value;

	if (selected_plan_id == 0)					// free plan was selected
		return false;
	
	if ($('plan-'+special_offer_plan_id) == null)	// if plan is not listed
		return false;
	
	// plan value is stored on [alt] attribute for each radio option  
	// see /signin/payment_fct.php -> show_pay_plans();
	var selected_plan_value = $('plan-'+selected_plan_id).getProperty('alt').toFloat();
	var special_offer_value = $('plan-'+special_offer_plan_id).getProperty('alt').toFloat();

	if (!selected_plan_value)			// value=0 for lottery plans so we can skipp special offer for those
		return false;	
	
	if (selected_plan_value > special_offer_value)
		return false;
	
	return true;			
			
} // END function


function special_offer_display()
{
	var scroll = $(document.body).getScroll();

	div = $("special-offer");	
	
	div.fade('hide');						// make it transparent
	div.setStyle("display","block");		// display it
	div.style.top = 150 + scroll.y;	
	div.fade('in');							// fade it
	
} // END function


// special offer is accepted
function special_offer_select(offer_plan_id)
{
	var f = document.modify; 
	var field = f.payment_plan;
	var regular_plan_id = get_radio(field);

	var query = 'action=special_offer_result&offer_plan_id='+offer_plan_id;
	query += '&regular_plan_id='+regular_plan_id+'&result=1'; 
	
	// send an ajax request to record that offer was accepted
	var req = new Request({url: 'proc.php', method: 'post', async: false});		// "async: false" is needed becaus in FF, request is aborted when form is submitted 
	req.send(query);	
	
	set_radio(field, offer_plan_id);			// select special offer plan
	f.rec_payment.checked = false;				// disable recurrent payment 
		
	f.submit();	
	
} // END function


// special offer is rejected (user goes with selected plan)
function special_offer_reject(offer_plan_id)
{
	var f = document.modify; 
	var field = f.payment_plan;
	var regular_plan_id = get_radio(field);

	var query = 'action=special_offer_result&offer_plan_id='+offer_plan_id;
	query += '&regular_plan_id='+regular_plan_id+'&result=0'; 
	
	// send an ajax request to record that offer was rejected	
	var req = new Request({url: 'proc.php', method: 'post', async: false}); 	// "async: false" is needed becaus in FF, request is aborted when form is submitted
	req.send(query);	
	
	document.modify.submit();	
}