function changeFilter(link, select, p)
{
  var type = select.options[select.options.selectedIndex].value; 
  
  var url = null;
  
  if(p == 0)
    url = link + type;
  else
    url = link + "p/" + type;
  document.location.href = url;
}

function changeTypeFilter(link, select, cat,  p)
{
  var type = select.options[select.options.selectedIndex].value; 
  
  var url = null;
  
  if(p == 0)
    url = link + type + "/" + cat;
  else
    url = link + "p/" + type + "/" + cat;
  document.location.href = url;
}