text box limit

//Similar to QQ to talk about limiting the number of characters entered in the text box, the KEYUP event is triggered

// Limit the number of characters entered in the text box
 $( "#saythings" ). keyup ( function (){
     var len = $( this ). val (). length ;
 if (len > 2000 ){$( this ). val ( $( this ). val (). substring ( 0 , 2000 )) ; }
     var num = 2000 - len ;
 $( ".counter" ). text (num) ;
 }) ;