一般一星期顺序如下：

星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"

function getMyDay(date){

var week;

if(date.getDay()==0) week="周日"

if(date.getDay()==1) week="周一"

if(date.getDay()==2) week="周二"

if(date.getDay()==3) week="周三"

if(date.getDay()==4) week="周四"

if(date.getDay()==5) week="周五"

if(date.getDay()==6) week="周六"

return week;

}

var w1 = getMyDay(new Date("2015-7-12"));