var IE4 = document.all? true : false; // IE version 4 and above
    var NN6 = !document.all && document.getElementById? true : false;  // Netscape Navigator 6.0 and above

    function qs ( S ) {
        Value = S.options[S.selectedIndex].value;

        if ( Value == "" ) {
            S.options[0].selected = true;
            return true;
        }

        if ( IE4 )
            if ( document.all.qf.value < " " && Value != "DEF" ) {
                alert ( "You must enter a value to search for   \nbefore you can do a quick search   " );
                S.options[0].selected = true;
                document.all.qf.focus();
                return true;
            }

        if ( NN6 )
            if ( document.getElementById("qf").value < " " && Value != "DEF" ) {
                alert ( "You must enter a value to search for   \nbefore you can do a quick search   " );
                S.options[0].selected = true;
                document.getElementById("qf").focus();
                return true;
            }

        document.quickquery.submit();
    }