获得系统的当前日期（当前日期星期几格式）

// 获取系统时间
var day = new Date();
var Year = 0;
var Month = 0;
var Day = 0;
var currentDate = "";
Year= day.getFullYear();
Month= day.getMonth()+1;
Day = day.getDate();
currentDate += Year;
if (Month >= 10 ){
currentDate += "-" + Month;
} else {
currentDate += "-" + "0" + Month;
}
if (Day >= 10 ){
currentDate += "-" + Day ;
} else {
currentDate += "-" + "0" + Day ;
}
// 星期
var dayNames = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
currentDate += " " + dayNames[day.getDay()];
$("#top_date").html(currentDate);