var ajax = new Array();

function getCityList(sel)
{
	var countryCode = sel.options[sel.selectedIndex].value;
	document.getElementById('city').options.length = 0;	// Empty city select box
	if(countryCode.length>0){
		var index = ajax.length;
		ajax[index] = new sack();
		
		ajax[index].requestFile = '../includes/getFamilyList.php?countryCode='+countryCode;	// Specifying which file to get
		ajax[index].onCompletion = function(){ createCities(index) };	// Specify function that will be executed after file has been found
		ajax[index].runAJAX();		// Execute AJAX function
	}
}

function createCities(index)
{
	var obj = document.getElementById('city');
	eval(ajax[index].response);	// Executing the response from Ajax as Javascript code	
}

<!-- Begin
function go(loc) {
window.location.href = loc;
}
//  End -->

function ValidateClass (form)
{
//TEXTFIELDS
	if ( document.Form1.FAOAreaCode.value == "" )
		{
		alert ( "Please select FAO Area." );
		document.Form1.FAOAreaCode.focus()
		return (false);
		}
	
	if ( document.Form1.ClassNum.value == "" )
		{
		alert ( "Please select Class." );
		document.Form1.ClassNum.focus()
		return (false);
		}
	
	if ( document.Form1.TL.value == "" )
		{
		alert ( "Total Length (TL) can not be blank." );
		document.Form1.TL.focus()
		return (false);
	}
}