Validation using Javascript / Jquery

Hi Ramco,

Please try use this one,

$("body").on('change', "#dropdownAction", function () {  
   var Reason= $(this).val().trim() ;  
   if (Reason == '1')  
    {  
      alert("Please add reason to Rejected");  
     $("input[name = txtRemarks]").prop('required',true);  
    }   
   });