求取星期几！！！求大神帮助

选取的年份 来求星期几


这张图片有说明 我吧我的js贴出来 你们帮我看看 那不对 谢谢

 function tuaisuan(){
    var shijian = $("#EntTime32").val();
    var arr = shijian.split('-');

    var nian = parseFloat(arr[0]);
    var yue = parseFloat(arr[1]);
    var ri = parseFloat(arr[2]);
    var shiji =  parseFloat(arr[0].substring(0,2));
    var nian1 =  parseFloat(arr[0].substring(2));

    //求星期
    if(yue<3){
        var yue1=yue+12
        /*var xingqi = parseFloat(nian1+[nian1/4]+[shiji/4]-2*shiji+[26*(yue1+1)/10]+ri-1);
        alert(xingqi);
        不知道为什么结果不对 我只好给他分段计算了
        */
            var s1 = nian1/4
            var s2 = shiji/4
            var s3 = 2*shiji
            var s4 = 26*(yue1+1)/10
            var s5 = parseInt(nian1+s1+s2-s3+s4+ri-1)
            alert(s4);alert(s5);

        }else{
            //var xingqi = parseInt(nian1+[nian1/4]+[shiji/4]-2*shiji+[26*(yue+1)/10]+ri-1);alert(xingqi); 不知道为什么结果不对 我只好给他分段计算了
            var s1 = nian1/4
            var s2 = shiji/4
            var s3 = 2*shiji
            var s4 = 26*(yue+1)/10
            var s5 = parseInt(nian1+s1+s2-s3+s4+ri-1)
            /*alert(s1);alert(s2);alert(s3);*/alert(s4);alert(s5);

            }

function tuaisuan(){
var shijian = "2016-07-01";
var arr = shijian.split('-');
var cen,year,month,day;
if (parseInt(arr[1]) < 3) {
arr[0] = (parseInt(arr[0]) - 1).toString();
arr[1] = (parseInt(arr[1]) + 12).toString();
}
cen = parseInt(arr[0].substr(0,2));
year = parseInt(arr[0].substr(2,2));
month = parseInt(arr[1]);
day = parseInt(arr[2]);
var week = year + Math.floor(year / 4) + Math.floor(cen / 4) - 2 * cen + Math.floor(26 * (month + 1) / 10) + day - 1;
alert(week%7);
}

把[]的地方全部改为parseInt，如[nian1/4]，改为parseInt(nian1/4)

function tuaisuan(){
  var shijian = $("#EntTime32").val();
  var arr = shijian.split('-');
  var ssdate=new Date(arr[0],parseInt(arr[1]-1),arr[2]);   
  alert(ssdate.getDay()); 
    }

function tuaisuan(){
var shijian = $("#EntTime32").val();
var arr = shijian.split('-');

var nian = parseFloat(arr[0]);
var yue = parseFloat(arr[1]);
var ri = parseFloat(arr[2]);
var shiji =  parseFloat(arr[0].substring(0,2));
var nian1 =  parseFloat(arr[0].substring(2));

//求星期
if(yue<3){
    nian1=nian1-1;
    var yue1=yue+12
    /*var xingqi = parseFloat(nian1+[nian1/4]+[shiji/4]-2*shiji+[26*(yue1+1)/10]+ri-1);
    alert(xingqi);
    不知道为什么结果不对 我只好给他分段计算了
    */
        var s1 = nian1/4
        var s2 = shiji/4
        var s3 = 2*shiji
        var s4 = 26*(yue1+1)/10
        var s5 = parseInt(nian1+s1+s2-s3+s4+ri-1)
        alert("12");
        alert(s5%7);

    }else{
        //var xingqi = parseInt(nian1+[nian1/4]+[shiji/4]-2*shiji+[26*(yue+1)/10]+ri-1);alert(xingqi); 不知道为什么结果不对 我只好给他分段计算了
        var s1 = nian1/4
        var s2 = shiji/4
        var s3 = 2*shiji
        var s4 = 26*(yue+1)/10
         alert("13");
        var s5 = parseInt(nian1+s1+s2-s3+s4+ri-1)
        /*alert(s1);alert(s2);alert(s3);*/alert(s5%7);

        }

}

星期几调用日期对象的getDay方法就行了，只是星期日对应额是0，不是7