function doit( ) {

    var form = document.search;
    var rim = form.rim.options[form.rim.selectedIndex].value;
    var width = form.width.options[form.width.selectedIndex].value;
    var ratio = form.ratio.options[form.ratio.selectedIndex].value;
    var dia = form.dia.options[form.dia.selectedIndex].value;
    
        form.drop1.value = 
        ( rim == "5.5" ) ? "5.5"
        : ( rim == "6" ) ? "6"
        : ( rim == "6.5" ) ? "6.5"
        : ( rim == "7" ) ? "7"
        : ( rim == "7.5" ) ? "7.5"
        : ( rim == "8" ) ? "8"
        : ( rim == "8.5" ) ? "8.5"
        : ( rim == "9" ) ? "9"
        : ( rim == "9.25" ) ? "9.25"
        : ( rim == "9.5" ) ? "9.5"
        : ( rim == "10" ) ? "10"
        : ( rim == "10.5" ) ? "10.5"
        : ( rim == "11" ) ? "11"
        : ( rim == "12" ) ? "12"
        : ( rim == "13" ) ? "13"
        : ( rim == "15" ) ? "15"
        
        : "N/A";
        
        form.drop2.value = 
        ( width == "105" ) ? "105"
        : ( width == "135" ) ? "135"
        : ( width == "145" ) ? "145"
        : ( width == "155" ) ? "155"
        : ( width == "165" ) ? "165"
        : ( width == "175" ) ? "175"
        : ( width == "185" ) ? "185"
        : ( width == "195" ) ? "195"
        : ( width == "205" ) ? "205"
        : ( width == "215" ) ? "215"
        : ( width == "225" ) ? "225"
        : ( width == "235" ) ? "235"
        : ( width == "245" ) ? "245"
        : ( width == "255" ) ? "255"
        : ( width == "265" ) ? "265"
        : ( width == "285" ) ? "285"
        : ( width == "295" ) ? "295"
        
        : "N/A";
        
        form.drop3.value = 
        ( ratio == "35" ) ? "35"
        : ( ratio == "40" ) ? "40"
        : ( ratio == "45" ) ? "45"
        : ( ratio == "50" ) ? "50"
        : ( ratio == "55" ) ? "55"
        : ( ratio == "60" ) ? "60"
        : ( ratio == "65" ) ? "65"
        : ( ratio == "70" ) ? "70"
        
        : "N/A";
        
        form.drop4.value = 
        ( dia == "13" ) ? "13"
        : ( dia == "14" ) ? "14"
        : ( dia == "15" ) ? "15"
        : ( dia == "16" ) ? "16"
        : ( dia == "17" ) ? "17"
        : ( dia == "18" ) ? "18"
        : ( dia == "19" ) ? "19"
        : ( dia == "20" ) ? "20"
        : ( dia == "22" ) ? "22"
        
        : "N/A";
        
document.search.words.value = (document.search.drop1.value + "_" + document.search.drop2.value + "_" + document.search.drop3.value + "_R" + document.search.drop4.value);
       
        }