function blogbox_catch() {
          aut = document.getElementById('aut').options[document.getElementById('aut').selectedIndex].value;
	        cat = document.getElementById('cat').options[document.getElementById('cat').selectedIndex].value;
	        wi = document.getElementById('wi').options[document.getElementById('wi').selectedIndex].value;
	        bc = document.getElementById('bc').options[document.getElementById('bc').selectedIndex].value;
	        tc = document.getElementById('tc').options[document.getElementById('tc').selectedIndex].value;;
	        n = document.getElementById('n').options[document.getElementById('n').selectedIndex].value;;

         code  = "<script type='text/javascript' src='http://www.autodifesalimentare.it/article_list.php";
         if ((aut!='')||(cat!='')||(bc!='')||(tc!='')||(n!='')) code += "?";

         if (aut!='') code += "aut="+ aut +"&";
         if (cat!='') code += "cat="+ cat +"&";
         if (wi!='')  code += "wi="+ wi +"&";
         if (bc!='')  {
            code += "bc="+ bc +"&";
            document.getElementById('bc').style.backgroundColor= '#'+bc;       
         } else {
            document.getElementById('bc').style.backgroundColor= '#ffffff';       
         }
         if (tc!='')  {
            code += "tc="+ tc +"&";
            document.getElementById('tc').style.backgroundColor= '#'+tc;
         } else {
            document.getElementById('tc').style.backgroundColor= '#ffffff';       
         }
         if (n!='')   code += "n="+ n +"&";
         code += "'></script>";
         document.getElementById('codice').value = code;
         


    }