function writeMakes(){
  for (i=0; i<make_v.length; i++){
    if (i == 0){
      document.write("<option value=''>SELECT VEHICLE MAKE</option>");
    }
    if (i > 1){
      document.write("<option value='"+make_v[i]+"'>"+make_v[i]+"</option>");
    }
  }
}
function writeModels(makeID){
  document.form1.model.options.length = 0;
  if (makeID == 0){
    document.form1.model.options[0] = new Option("SELECT VEHICLE MODEL","");
  }
  else {
    for (i=1; i<_model[makeID+1].length; i++){
      document.form1.model.options[i-1] = new Option(_model[makeID+1][i],_model[makeID+1][i]);
    }
  }
}