$(document).ready(function(){
  function check_of(){
    var usl=$("div#oformlenie input[name='usl']:checked").val();
    if(usl=="on")
      $("div#oformlenie input:submit").removeAttr('disabled');
    else
      $("div#oformlenie input:submit").attr('disabled', 'disabled');
  }
	
  $("div#oformlenie input:checkbox").change(function(){check_of()});
	
  $("div#oformlenie input[name='oplat']").change(function(){
    if($("div#oformlenie input[name='oplat'][value='2']").is(":checked")){
      $("div#oformlenie input[name='dost'][value='1']").attr("disabled","disabled");
      $("div#oformlenie input[name='dost'][value='2']").attr("disabled","disabled");
      $("div#oformlenie input[name='dost'][value='6']").attr("disabled","disabled");
      $("div#oformlenie input[name='dost'][value='5']").attr("disabled","disabled");
      $("div#oformlenie input[name='dost'][value='3']").attr("checked","checked");
    }else{
      $("div#oformlenie input[name='dost']").removeAttr("disabled");
      $("div#oformlenie input[name='dost'][value='1']").attr("checked","checked");
    }
  })
  check_of();
  $("table#basket tbody").sortable();
})