function add_to_cart (id) {
	
	var form = document.forms["main_form"];
	
	form.action 		= "";
	form["cmd"].value 	= "add_to_cart";
	form["id"].value 	= id;
	form.submit();
	
}

function remove_from_cart (id) {
	
	var form = document.forms["main_form"];
	
	form.action 		= "";
	form["cmd"].value 	= "remove_from_cart";
	form["id"].value 	= id;
	form.submit();
	
}

function login () {
	
	var form = document.forms["login_form"];
	form.submit();
	
}

function show_iframe () {
	$("#iframe").show();
	$("#payment").hide();
	
}