function registerAjaxInfo(callbackfunction, sourceurl, documentid) {
   alert("registerAjaxInfo called!");
   ajaxEngine.registerRequest( callbackfunction, sourceurl );
   ajaxEngine.registerAjaxElement( documentid );
}
function getInnerHtml(documentid) {
    alert("getInnerHtml called!");
   ajaxEngine.sendRequest( documentid);
}