JSは2つの日付の時間差を計算して、1日の時間の分秒のフォーマット

function diffTime(startDate,endDate) {
	var diff=endDate.getTime() - startDate.getTime();//       

	//       
	var days=Math.floor(diff/(24*3600*1000));

	//      
	var leave1=diff%(24*3600*1000);    //           
	var hours=Math.floor(leave1/(3600*1000));
	//       
	var leave2=leave1%(3600*1000);        //            
	var minutes=Math.floor(leave2/(60*1000));

	//      
	var leave3=leave2%(60*1000);      //            
	var seconds=Math.round(leave3/1000);

	var returnStr = seconds + " ";
	if(minutes>0) {
		returnStr = minutes + " " + returnStr;
	}
	if(hours>0) {
		returnStr = hours + "  " + returnStr;
	}
	if(days>0) {
		returnStr = days + " " + returnStr;
	}
	return returnStr;
}