var oXmlHttp = zXmlHttp.createRequest();

function loadNewsletterByPkid(pkid) {
	// clere the fkADUser selectbox
	$('newsLetterDetails').innerHTML = '<p>Please wait while content loads</p>';
	
	if (pkid != '') {
		//cancel any active requests
		if (oXmlHttp.readyState != 0) {
			oXmlHttp.abort();
		}
		
		oXmlHttp.open("get","/ajax/?m=ajaxFunctions&func=loadNewsletterByPkid&pkid="+pkid,true);
		oXmlHttp.setRequestHeader("Content-Type", "text/html");
		oXmlHttp.onreadystatechange = function () {
			if (oXmlHttp.readyState != 4) {
				$('newsLetterDetails').innerHTML = '<br />Please wait while content loads';
			}else{
				if (oXmlHttp.responseText != '') {
					var text = oXmlHttp.responseText;
					$('newsLetterDetails').innerHTML = '';
					$('newsLetterDetails').innerHTML = text;
				}
				return true;
			}
		}
		oXmlHttp.send(null);
	} else {
		$('newsLetterDetails').innerHTML = '';
	}
}