function ChangeCity( oSel )
{
var intSelected = oSel.value;
var intSelect = 0;
var intDefault = 0;
oSel.options.length = 0;
for (i = 1; i < CityRegion.length; i++)
{
oSel.options[oSel.length] = new Option(CityRegion[i][1], CityRegion[i][0], false, false);
if (CityRegion[i][0]==CityRegion[0] && CityRegion[0]!=0)
intDefault = i - 1;
if (CityRegion[i][0]==intSelected)
intSelect = i - 1;
}
if (intSelect>1)
oSel.selectedIndex = intSelect;
else
if (intDefault>0)
oSel.selectedIndex = intDefault;
else
oSel.selectedIndex = 0;
}