moodle/group/groupui/creategrouping-form.js

function onCreateGrouping() {
	valid =  validateCreateGroupingForm();
	if (valid) {
		hideAllForms();
		showElement("groupeditform");
		createGrouping();
	}
	
	return false;
}

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

function validateCreateGroupingForm() {
	valid = true;
 	groupingname = getTextInputValue('newgroupingname');

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