images_path = "/images/"
function onOverStar( value )
{
 for(var i=1; i<=5; i++)
 {
  var state = i <= value ? 'on' : 'off'
  $('star'+i).src = images_path + "star_" + state + ".png";
 }
}
function onOutStar( value )
{
 for(var i=1; i<=5; i++)
 {
  var img = $('star'+i)
  img.src = images_path + img.className + ".png";
 }
}