in src/main/js/bmaputil.js [132:137]
removeCookie : function (name) {
if (!name || !this.cookieExists(name)) { return; }
var oExpDate = new Date();
oExpDate.setDate(oExpDate.getDate() - 1);
document.cookie = encodeURIComponent(name) + '=; expires=' + oExpDate.toGMTString() + ';';
},