function checkInputDate(obj){    var   strDate=obj.value;    var  re =/^(\d{4})-(\d{2})-(\d{2})$/;    if(re.test(strDate))//判断日期格式符合YYYY-MM-DD标准    {     var   dateElement=new   Date(RegExp.$1,parseInt(RegExp.$2,10)-1,RegExp.$3);      if(!((dateElement.getFullYear()==parseInt(RegExp.$1))&&((dateElement.getMonth()+1)==parseInt(RegExp.$2,10))&&(dateElement.getDate()==parseInt(RegExp.$3))))//判断日期逻辑      {        document.getElementById("errorMessage").innerText = "You can only input Date.(YYYY-MM-DD) !";        document.getElementById("error").style.display = "";        obj.value= ' ';       }    }else{     document.getElementById("errorMessage").innerText = "You can only input Date.(YYYY-MM-DD)!";        document.getElementById("error").style.display = "";        obj.value= '';    }  }