$(function(){
   var originWindow = $(window).width();
   var originPodition = originWindow/10 + 'px';
   $('#imagealt').css('right', originPodition);
   
   $(window).bind('resize',function(){
      var resizeWindow = $(window).width();
      var resizePodition = resizeWindow/10 + 'px';
      $('#imagealt').css('right', resizePodition);
   });

});