JS 验证日期格式
//判断input是否符是日期
function isDateString(sDate)
{ 
   var mp=/\d{4}-\d{2}-\d{2}/;

   var matchArray = sDate.match(mp);
   if (matchArray==null) return false;
   var iaMonthDays = [31,28,31,30,31,30,31,31,30,31,30,31];
   var iaDate = new Array(3);
   var year, month, day; 
   
    iaDate = sDate.split("-");    
    year = parseFloat(iaDate[0])
    month = parseFloat(iaDate[1])
    day=parseFloat(iaDate[2])
    if (year < 1900 || year > 2100) return false;
    if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) iaMonthDays[1]=29;
    if (month < 1 || month > 12) return false;
    if (day < 1 || day > iaMonthDays[month - 1]) return false;
    return true;
}

使用
if(!isDateString(complete_date))
      {
    alert("实际完成日期格式不正确,日期格式为yyyy-mm-dd");
    return;
      }