xmlresponse AJAX

catch xmlHttp.responseXML
if(!xmlResponse !xmlResponse.documentElement) throw
var nodeName = xmlResponse.documentElmeent.nodeName;
if(nodeName == "parsererror") throw ...

create XML document

if(document.implementation && document.implementation.createDocument){ xmlDoc = document.implementation.createDocument("","",null); } else if (window.ActiveXObject){ xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
}

velocity event cartridge

http://www.java2s.com/Code/Java/Velocity/AsimpledemonstrationofhowtheeventhandlingfeaturesoftheVelocityServletEngineareused.htm