function joinCommunity(userId, groupId, publicGroup, comments, parms) {
	var settings = {welcome: false,
			        greeting: "",
			        refresh: false
			       };
	settings = parms || settings;
	
    jQuery.ajax({url: "/portal/ic/join?userId=" + userId + "&groupId=" + groupId + "&public=" + publicGroup + "&comments=" + comments,
                 type: "GET",
                 dataType: "text",
                 error: function(xmlObj, textStatus, errorThrown) {
                            var errorString = '';
                            if (textStatus != null) errorString = textStatus;
                            if (errorThrown != null) errorString += errorThrown;
                            alert('Error: ' + errorString);
                        },
                 success: function(text, status) {
                        	  if (settings.welcome)
                        		  alert(settings.greeting);
                        	  if (settings.refresh)
                        		  location.reload(true);
                          }
                 });
}