//星座定义var constellations = [    {"Start":121,"End":220,"Name":"水平座"},    {"Start":221,"End":320,"Name":"双鱼座"},    {"Start":321,"End":420,"Name":"白羊座"},    {"Start":421,"End":520,"Name":"金牛座"},    {"Start":521,"End":620,"Name":"双子座"},    {"Start":621,"End":720,"Name":"巨蟹座"},    {"Start":721,"End":820,"Name":"狮子座"},    {"Start":821,"End":920,"Name":"处女座"},    {"Start":921,"End":1020,"Name":"天秤座"},       {"Start":1021,"End":1120,"Name":"天蝎座"},        {"Start":1121,"End":1220,"Name":"射手座"}    ];    function WhatIsYourConstellation(y,m,d){    /*    判断日期有效性    1,3,5,7,8,10,12为31天    2月润年29，非润年28    4,6,9,11为30天    */    var daysInMonth = [31,99,31,30,31,30,31,31,30,31,30,31];        //检测年份    if(y < 1970 || y > 2099) return "滚犊子1";        //检测月份    if(m < 1 || m > 12) return "滚犊子2";        //检测日期    var mDays = daysInMonth[m-1];    //如果是二月，要根据年份计算天数，不是二月时略过此计算    if(m == 2)    {        mDays = GetSpecialDays(y)    }    //判断日数据是不是在月份的有效天范围    if(d < 0 || d > mDays)  return "滚犊子3";    //好了，走到这一步，说明上面的验证都TM过了。    //这才判断是哪一个星座    //星座座标等于m*100 + d    var pos = m * 100 + d;    for(var i in constellations)    {        if(pos >= constellations[i].Start && pos <= constellations[i].End)        {            return constellations[i].Name;        }    }}//根据年份计算二月天数function GetSpecialDays(y){     if (y % 400 == 0 || (y % 4 == 0 && y % 100 != 0)) return 29;     return 28;}

<meta http-equiv="content-type" content="text/html;charset=utf-8"><script src="xx.js"></script><div id="log"></div><script>    function testCase(y,m,d)    {        var p = document.createElement("p");        p.style.color = "red";        p.style.fontSize = "14px";        var data = WhatIsYourConstellation(y,m,d);        p.innerText = y  + "年" + m + "月" + d + "日的计算结果：" + data;        document.getElementById("log").appendChild(p);    }        testCase(1800,1,1);    testCase(2000,-1,1);    testCase(2000,13,1);    testCase(2000,1,-1);    testCase(2000,1,32);    testCase(2000,2,32);    testCase(2000,2,29);    testCase(2001,2,29);</script>