function SetUpCity()
{
	inForm = document.checkavail;
	value = document.checkavail.city.options[0].value;
	selectedindex = document.checkavail.city.selectedIndex;
	while (Thailand_cityArray.length < inForm.city.options.length)
	{
		inForm.city.options[(inForm.city.options.length - 1)] = null;
	}
	for (var i=0; i < Thailand_cityArray.length; i++)
	{
		eval("inForm.city.options[i]=" + "new Option" + Thailand_cityArray[i]);
	}
	document.checkavail.city.selectedIndex = selectedindex;

	selected = document.checkavail.city.options[document.checkavail.city.selectedIndex].value;
	selectedArray = eval(selected + "Array");

	selectedindex = document.checkavail.prefix.selectedIndex;

	while (selectedArray.length < inForm.prefix.options.length)
	{
		inForm.prefix.options[(inForm.prefix.options.length - 1)] = null;
	}

	for (var i=0; i < selectedArray.length; i++)
	{
		eval("inForm.prefix.options[i]=" + "new Option" + selectedArray[i]);
	}
	document.checkavail.prefix.selectedIndex = selectedindex;
}

function changeCity()
{
	inForm = document.checkavail;
	selected = document.checkavail.city.options[document.checkavail.city.selectedIndex].value;
	value = document.checkavail.city.options[0].value;

	selectedArray = eval(selected + "Array");

	while (selectedArray.length < inForm.prefix.options.length)
	{
		inForm.prefix.options[(inForm.prefix.options.length - 1)] = null;
	}

	for (var i=0; i < selectedArray.length; i++)
	{
		eval("inForm.prefix.options[i]=" + "new Option" + selectedArray[i]);
	}
}