function pop_radio (a) {
   document.search.search_type.value = a;
     if (a == 1) {
       n = document.search.name.length;
       field = name;
       document.search.hmonth.options.selectedIndex = 0;
       document.search.hday.options.selectedIndex = 0;
       document.search.hyear.value = "Year";
       document.search.fmonth.options.selectedIndex = 0;
       document.search.fday.options.selectedIndex = 0;
       document.search.fyear.value = "Year";
       document.search.casenum.value = "";
       document.search.ticknum.value = "";
     } else if (a == 4) {
       n = document.search.hmonth.length;
       field = document.search.hmonth;
       document.search.name.value = "";
       document.search.fmonth.options.selectedIndex = 0;
       document.search.fday.options.selectedIndex = 0;
       document.search.fyear.value = "Year";
       document.search.casenum.value = "";
       document.search.ticknum.value = "";
     } else if (a == 5) {
       n = document.search.ticknum.value;
       field = document.search.ticknum;
       document.search.name.value = "";
       document.search.hmonth.options.selectedIndex = 0;
       document.search.hday.options.selectedIndex = 0;
       document.search.hyear.value = "Year";
       document.search.fmonth.options.selectedIndex = 0;
       document.search.fday.options.selectedIndex = 0;
       document.search.fyear.value = "Year";
       document.search.casenum.value = "";
     } else if (a == 8) {
       n = document.search.casenum.value;
       field = document.search.casenum;
       document.search.name.value = "";
       document.search.hmonth.options.selectedIndex = 0;
       document.search.hday.options.selectedIndex = 0;
       document.search.hyear.value = "Year";
       document.search.fmonth.options.selectedIndex = 0;
       document.search.fday.options.selectedIndex = 0;
       document.search.fyear.value = "Year";
       document.search.ticknum.value = "";
     } else if (a == 9) {
       n = document.search.fmonth.value;
       field = document.search.fmonth;
       document.search.name.value = "";
       document.search.hmonth.options.selectedIndex = 0;
       document.search.hday.options.selectedIndex = 0;
       document.search.hyear.value = "Year";
       document.search.casenum.value = "";
       document.search.ticknum.value = "";
     }
   
 }