title: How to validate sharepoint datetime control?
body: <p>I am using sharepoint datetime control, and when i use range,regular or some other validation controls, every time error message will show up when input wrong format (this is right), but after that when i input right date, this error message won't disappear, it stays there, can't remove... (problem happened)</p>
  
  <p>Is there any other way like javascript to validate it?</p>