function OpenActivateProTrialPopup()
{
	var popup = GetElement("activateProTrialPopup");
	
	var popupTop  = ($(window).height() - $(popup).outerHeight()) / 2 + $(window).scrollTop();
	var popupLeft = ($(window).width() - $(popup).outerWidth()) / 2;
		
	$(popup).css({
		top: popupTop,
		left: popupLeft
	});
	
	SwitchVisibility(popup);
}

function PurchaseMonthlySubscription()
{
	var form = GetElement("frmPremiumUpgrade");
	form.action.value = "upgrade_monthly";
	SubmitForm("frmPremiumUpgrade");
}

function PurchaseAnnualSubscription()
{
	var form = GetElement("frmPremiumUpgrade");
	form.action.value = "upgrade_annual";
	SubmitForm("frmPremiumUpgrade");
}

function CloseActivateProTrialPopup()
{
	SetVisibility("activateProTrialPopup", false);
}