function sndReq_BuildNav(tab, subtab){
	destURL = 'div/nav.jsp';
	var queryPost = 'maintab=' + tab + "&subtab=" + subtab;	
	reqNavPane = createXMLRequestObject();
	reqNavPane.onreadystatechange = handleResponseNav;
	reqNavPane.open('post', destURL);
	reqNavPane.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); 
	reqNavPane.send(queryPost);
}

function handleResponseNav() {

	
	if(reqNavPane.readyState == 4){
	
	  testResponse(reqNavPane);
	  
		var response = reqNavPane.responseText;

		// set nav panel		
		parent.document.getElementById("divNavPanel").style.display = 'block';		
		parent.document.getElementById("divNavPanel").innerHTML = response;
					
		// Clear the event handler
		reqNavPane.onreadystatechange = emptyFunction;
	}
}