if ((this.readyState === 4) && ((this.status / 100) == 2)) {
march_list = (JSON.parse(this.responseText));
march_list = march_list.filter(function(room) {
if ((this.readyState === 4) && ((this.status / 100) == 2)) {
march_list = (JSON.parse(this.responseText));
march_list = march_list.filter(function(room) {