function GetRoadName(iROSN)
{
   var iLen = aryRoadIdx.length;
   for(var i=0; i < iLen; i++)
   {
      if(aryRoadIdx[i] == iROSN)
         return aryRoadName[i];
   }
}

function ChangeRoadCross(myForm,iROSN)
{
   var iLen = 0;
   if(iROSN == 0)
      return;
   iLen = aryRoadIdx.length;
   for(var i=0; i < iLen; i++)
   {
      if(aryRoadIdx[i] == iROSN)
      {
         iIdx = i;
         break;
      }
   }
   if(i == iLen)
      return;
   iLen = aryRoadCrossSN[iIdx].length;
   myForm.road2.length = iLen;
   for(var i=0; i<iLen; i++)
   {
      iGetSN = aryRoadCrossSN[iIdx][i];
      myForm.road2.options[i].text = GetRoadName(iGetSN);
      myForm.road2.options[i].value = aryRCSN[iIdx][i];
   }
}

function RoadSearch(myForm)
{
   if(myForm.road2.length < 1)
      return;
   location.href = "list.php?r_city=" + myForm.city.value + "&rcsn=" + myForm.road2.options[myForm.road2.selectedIndex].value;
}