function callServer()
{
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
	 http_request = new XMLHttpRequest();
	 if (http_request.overrideMimeType) {
	 	// set type accordingly to anticipated content type
	    //http_request.overrideMimeType('text/xml');
	    http_request.overrideMimeType('text/html');
	 }
	} else if (window.ActiveXObject) { // IE
	 try {
	    http_request = new ActiveXObject("Msxml2.XMLHTTP");
	 } catch (e) {
	    try {
	       http_request = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch (e) {}
	 }
	}
	if (!http_request) {
	 alert('Cannot create XMLHTTP instance');
	 return false;
	}
	else
	{
		//alert('Created XMLHTTP instance');
	}
	
	var op_name = encodeURI(document.getElementById("opinion_name").value);
	var op_comment = encodeURI(document.getElementById("opinion_comment").value);
	// Only go on if there are values for both fields
	if ((op_name == null) || (op_name == "")) return;
	if ((op_comment == null) || (op_comment == "")) return;
	
	var parameters="op_name="+escape(op_name)+"&op_comment="+escape(op_comment);
	// Build the URL to connect to
	var url = "process.php";
	//document.write(url);
	
	http_request.onreadystatechange = updatePage;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function updatePage() {
  if (http_request.readyState == 4) {
    var response = http_request.responseText;
    document.getElementById("new_testimonial_box").innerHTML = response;
  }
}