function onEditGroupingSettingsSave() {
	valid = validateEditGroupingSettingsForm();
	if (valid) {
		hideAllForms();
		showElement("groupeditform");
		editGroupingSettings() ;
		return false;
	}
}


/**
 * Creates a new grouping for the course. 
 */
function editGroupingSettings() {
 	var url = "editgroupingsettings-xml.php";
    var requeststring = "groupingid="+selectedgroupingid
						+"&groupingname="+getTextInputValue('edit-groupingname')
						+"&description="+getTextInputValue('edit-edit-groupingdescription');
    sendPostRequest(request, url, requeststring, editGroupingSettingsResponse);
 }
 
 /**
  * The callback for the response to the request sent in editgroupingsettings() 
  * It sets the new grouping as selected in the form. 
  */
 function editGroupingSettingsResponse() {
    if (checkAjaxResponse(request)) {
    	//alert("editGroupingSettingsResponse called");
      	//alert(request.responseText);
      	error = getFromXML(request.responseXML, 'error');
      	if (error != null) {
      		alert(error);	
      	}
      	updateGroupings();
      	hideElement("editgroupingsettingsform");
    }
}

function getGroupingSettings() {
 	//alert("Called getgroupingsettings");
 	var url = "getgroupingsettings-xml.php";
    var requeststring = "groupingid="+selectedgroupingid;
    sendPostRequest(request, url, requeststring, getGroupingSettingsResponse);
}

function getGroupingSettingsResponse() {
    if (checkAjaxResponse(request)) {
    	//alert("getgroupingsettingsResponse");
      	//alert(request.responseText);
      	error = getFromXML(request.responseXML, 'error');
      	if (error != null) {
      		alert(error);	
      	}          	
      	xml = request.responseXML;
      	setTextInputValue('edit-groupingname', getFromXML(xml, 'name'));
      	setTextInputValue('edit-edit-groupingdescription', getFromXML(xml, 'description'));
    }
}


function validateEditGroupingSettingsForm() {
	valid = true;
 	groupingname = getTextInputValue('edit-groupingname');

 	if (groupingname == '') {
 			alert('You must enter a name for the new grouping');
 			valid = false;
 	} 
	return valid;
}