onLoad()
    {
        //向上取整数(小数舍去,正数部分+1)
        cc.log(Math.ceil(1.111));//=2
        cc.log(Math.ceil(1.6666));//=2
        //向下取整数(小数直接舍去)
        cc.log(Math.floor(1.111));//=1
        cc.log(Math.floor(1.666));//=1
        //四舍五入
        cc.log(Math.round(1.111));//1
        cc.log(Math.round(1.666));//2
        //保留小数
        cc.log(1.1111.toFixed());//1
        cc.log(1.1111.toFixed(2));//1.11
        cc.log(1.1111.toFixed(3));//1.111
     }