var ArrCitie=new Array();
var ArrCityId=new Array();
var ArrStates=new Array();
ArrStates[0]='17';ArrCityId[0]='10';ArrCitie[0]='fff';ArrStates[1]='17';ArrCityId[1]='8';ArrCitie[1]='nick_name';ArrStates[2]='17';ArrCityId[2]='9';ArrCitie[2]='uu';
function swapOptionsCitys(theForm,thecityId,theSubSelect)
    {
	  theSubSelect.options.length=0;
	  theSubSelect.disabled = false;
	  var counter=0;
	  theSubSelect.options[counter] = new Option('Select landing_pg','');
	  for (var loop=0; loop < ArrCities.length; loop++)
      {
    	if(ArrStates[loop]==thecityId)
		  {
			theSubSelect.options[counter+1] = new Option(ArrCitie[loop], ArrCityId[loop]);
			counter++;
		  }
	   }
	}