/**
 * 常量
 */

_.extend(BI, {
    MAX: 0xfffffffffffffff,
    MIN: -0xfffffffffffffff,
    EVENT_RESPONSE_TIME: 200,
    zIndex_layer: 1e5,
    zIndex_floatbox: 1e6,
    zIndex_popup: 1e7,
    zIndex_masker: 1e8,
    zIndex_tip: 1e9,
    emptyStr: "",
    emptyFn: function () {
    },
    empty: null
});