var fEarthquake = false;
  
  function switchinterest(select) {
     var index;
     
     for (index=0; index < select.options.length; index++)
        if (select.options[index].selected) {
           if (select.options[index].value!="-")
              document.interestform.submit();
              break;
        }
     return(true);
  }