numeric value insert only

 /*
    * only numeric value insert in specification
    */
  //called when key is pressed in textbox
   $("body").on('keypress','.numeric',function (e) {
     //if the letter is not digit then display error and don't type anything
     if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) {
       
               return false;
    }
  
  });
 

});

$(document).ready(function(){
    $(document).on("cut copy paste",".numeric",function(e) {
        e.preventDefault();
    });
 });