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function test(id){
var NewArray = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六")
var obj = document.getElementById(id);
KingVal = obj.value;
DateYear = parseInt(KingVal.split("-")[0]);
DateMonth = parseInt(KingVal.split("-")[1]);
DateDay = parseInt(KingVal.split("-")[2]);
var NewDate = new Date(DateYear,DateMonth-1,DateDay);
var NewWeek = NewDate.getDay();
alert(NewArray[NewWeek]);
}
时间太急，有待改进，但是以上不会出错，望采纳！
