var http_request = false;
   function makePOSTRequest(url, parameters) {
      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;
      }
      
      http_request.onreadystatechange = alertContents;
      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 alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
      var poststr = "ns_sig_0=" + encodeURI( document.getElementById("ns_sig_0").value );
      makePOSTRequest('../cms/plugin_subscribe/subscribe.php', poststr);
   }
 
 
 
 // - - - - - - - - - - - - - -  -- 
 // VALIDATION
 // - - - - - - - - - -- - - - - -
 
 function IsNotNull() {

	if ( document.subscribeplugin.ns_sig_0 == null ) {
		 alert("OOPS\n\nYou need to enter your email address to subscribe.");
		 return false;
		 }
		 
	if ( document.subscribeplugin.ns_sig_0.value.length == 0 ) {
		 alert("OOPS\n\nYou need to enter your email address to subscribe.");
		 return false;
		 }

		 
	return true;
	
}

function IsValidEmail() {

		var email = document.subscribeplugin.ns_sig_0.value;
		var myreg = /^[^@\s]+@([-a-z0-9]+\.)+[a-z]{2,}$/
		if ( myreg.test(email)) { 
		return true;
		}
		else {
		alert("The Email address you entered is not valid, please enter a valid email address to continue.\nValid emails are in the format of eg:name@youremail.com");
		return false;
		}
}




function CheckFields() {
	if ( IsNotNull() == false ) {
	return false;
	}
	
	if ( IsValidEmail() == false ) {
	return false;
	}
	

	
}