problems with jq removeAttr using several radio buttons

problems with jq removeAttr using several radio buttons

Hello!

have problem...

I use datapicker.
I need to change checked attribute when I choose date.
when I change date I need to remove all my cheched attribuses 
and set checked attribute just for one radio button

but now when I choose date I cant remove attributes
  1.  if(dayOfWeek == 5)
    {
          $('#tsenik').text('$10.00');

          $('#price1').attr('checked', 'checked');
          $('#price2').removeAttr('checked');
          $('#price3').removeAttr('checked');
          $('#price4').removeAttr('checked');

    }
    else if( $.inArray(holidayDay,holidaysArray) == 1 )
    {
          $('#tsenik').text('$15.00');
          $('#price2').attr('checked', 'checked');

    }
    else if(difMonths == 0 && difDays < 11 )
    {
          $('#tsenik').text('$20.00');
          $('#price3').attr('checked', 'checked');

    }
    else
    {























  1.       $('#tsenik').text('$0.00'); $('#price4').attr('checked', 'checked'); } 


  1. <p>Date:
    <label id="tsenik">$0.00</label>
    <input type="text" id="datepicker" />

    <input type="radio" id="price1" />
    <input type="radio" id="price2" />
    <input type="radio" id="price3" />

    <input type="radio" id="price4" />








  1. </p>