Disabled input with JQuery

We have in html inputs like text, radio, select and textareas.

In my situation i had radio inputs and i needed to create trigger which should effect other inputs ( disable them ).

My inputs:

<input name="order_type" type="radio" value="2" /><br />
<input name="order_type" type="radio" value="3" /><br />
<input name="order_type" type="radio" value="4" />

Other section which i want to disable:

<input class="viewspereach" name="text" type="text" value="" />

JQuery:

$("input[name=order_type]").change(check_ordertype);
  
  function check_ordertype()
  {
    var order_type = $("input[name=order_type]:checked").attr("value");
    
    if(order_type == 4)
    { 
      $(".viewspereach").prop('disabled', true);

    }
    else
    {
      $(".viewspereach").prop('disabled', false);
    }
  }

Demo: http://igloro.info/demos/disableinput.php