title: Sharepoint Make a custom list read only
body: <p>I have created a custom list. I am using the same list  in sharepoint designer through a page. </p>
  
  <p>I a have a datetime field in the form. I want to make a default current date and time and let it make readonly.</p>
  
  <p>How can I do the same.</p>
  
  <p>thanks </p>