function createRequestObject(){
	var request_o;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		request_o = new ActiveXObject("Microsoft.XMLHTTP");
	}else{
		request_o = new XMLHttpRequest();
	}
	return request_o; //return the object
}

var http = createRequestObject();

function check_email_avail(x){
	http.open('get', '/ajax.php?action=check_email&email=' + x);
	http.onreadystatechange = handleEmail; 
	http.send(null);
}

function handleEmail(){
	if((http.readyState == 4)&&(http.status == 200)){
		var r = http.responseText;
		document.getElementById('email_check').innerHTML = r;
	}
}

function create_order(){
	http.open('get', '/ajax.php?action=create_order');
	http.onreadystatechange = handle_order;
	http.send(null);
}

function handle_order(){
	if(http.readyState==4){
		var r = http.response;
		document.paypal_form.submit();
	}
}