顯示今天日期

var RightNow = new Date();

var RightY = RightNow.getFullYear();//年

var RightM = RightNow.getMonth()+1; //月-月份就會從 0 開始, 所以正確月份需加 1

RightM += ''; //轉成字串

//若月份長度為1，則前面補0

if (RightM.length == 1){

　　RightM = '0'+RightM;

}

var RightD = RightNow.getDate(); //日

RightD += ''; //轉成字串

//若日長度為1，則前面補0

if (RightD.length == 1){

　　RightD = '0'+RightD;

}

alert(RightY+'-'+RightM+'-'+RightD);

=>YYYY-MM-DD