var requestData="";
function makeRequest(url)
{
	var httpRequest;

	if (window.XMLHttpRequest)
	{ // Mozilla, Safari, ...
		httpRequest = new XMLHttpRequest();
		/*if (httpRequest.overrideMimeType)
		{
			httpRequest.overrideMimeType('text/xml');
			// See note below about this line
		}*/
	} 
	else if (window.ActiveXObject)
	{ // IE
		try
		{
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e)
		{
			try
			{
				httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) {}
		}
	}
	if (!httpRequest)
	{
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	httpRequest.onreadystatechange = function() { processContents(httpRequest); };
	httpRequest.open('GET', url, false);
	httpRequest.send('');
	requestData=httpRequest.responseText;
	//alert(requestData);
	return(true);
}
function processContents(httpRequest)
{
	//alert(httpRequest.readyState);
	if (httpRequest.readyState == 4)
	{
		if (httpRequest.status == 200)
		{
			//alert('there');
			requestData=httpRequest.responseText;
		}
		else
		{
			requestData=null;
		}
	}
}
function getData (stn, enso)
{
	var ensoquery="";
	var stnquery="";
	if(enso)
	{
		for (var i=0; i<enso.length; i++)
			ensoquery+="&enso"+i+"="+enso[i];
	}
	if(stn)
		stnquery="stn="+stn;
	success=makeRequest("seasonlist.php?"+stnquery+ensoquery);
	//alert(requestData);
	if(requestData==null||!success)
		return(false);
	else
		return(requestData);
}