$('document').ready(function(){
	document.order_form.trial.onclick = function(){billing()};
	billing();
});

function billing(){
	var cc_info = $('#i_billing')[0];
	var trial = document.order_form.trial;
	for ( var i = 0; trial.length > i; i ++ ){
		if ( trial[i].value == 1 && trial[i].checked){
			cc_info.style.display = 'none';	
		}
		if ( trial[i].value == 0 && trial[i].checked){
			cc_info.style.display = 'block';	
		}
	}
}