new Date 兼容性

function NewDate(str) {

    if ((typeof str) == "string") {

        str = str.split(' ');

        var year = str[0].split('-');

        var time = str[1].split(':');

        var date = new Date();

        date.setUTCFullYear(year[0], year[1] - 1, year[2]);

        date.setUTCHours(time[0], time[1], time[2], 0);

        return date.getTime();

    }

}