var fb_xhr;
	
	function send_feedback() {
		var f=document.fb;

		if (f.fb_feedback.value=="") {
			alert("Please enter your feedback in the box provided.");
			return false;
		}
		
		// Mozilla version
		if (window.XMLHttpRequest) {
		   fb_xhr = new XMLHttpRequest();
		}
		// IE version
		else if (window.ActiveXObject) {
		   fb_xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	   
		fb_xhr.onreadystatechange=function() {
			if (fb_xhr.readyState==4) {
				document.getElementById('feedback_form').innerHTML="<p>"+fb_xhr.responseText+"<br /><br /></p>";
			}
			return;
		}

		postinfo="&fb_name="+f.fb_name.value+"&fb_email="+f.fb_email.value+"&fb_feedback="+f.fb_feedback.value+"&fb_page="+f.fb_page.value;
		fb_xhr.open('post','/php_inc/send_fb.php');
		fb_xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=UTF-8');
		fb_xhr.send(postinfo);
	}