function refresh_cate(form_name) {
   if (form_name.categories_id.options[form_name.categories_id.selectedIndex].value != "") {
	 form_name.submit();
     return true;
   }
}
function refresh_price(form_name) {
   if (form_name.pfrom_pto.options[form_name.pfrom_pto.selectedIndex].value != "") {
	 form_name.submit();
     return true;
   }
}