function updatemap()
{
	var defaultMap = "/static/media/worldmap.png";
	var imWM = document.getElementById('wmim');
	var waitIm = document.getElementById('waitanim');

	waitIm.src = "/static/media/spinning_globe.gif";
	var xhttp = null;
	if (window.XMLHttpRequest)
	{
		xhttp=new XMLHttpRequest();
	}
	else
	{
		xhttp=new ActiveXObject('Microsoft.XMLHTTP');
	}
	var amount = document.getElementById('kg').value;
	// numeric test from http://stackoverflow.com/questions/18082/validate-numbers-in-javascript-isnumeric
	if (!isNaN(parseFloat(amount)) && isFinite(amount) && amount >= 0 && amount != '')
	{
		var by = document.getElementById('method');
		by = by.options[by.selectedIndex].text;
		var qurl = '/pos-malaysia-world-map/'+amount+'-by-'+encodeURI(by)+'.xml';
		// alert(qurl);
		xhttp.open('GET',qurl,false);
		xhttp.send('');
		var xmlDoc = xhttp.responseXML;
		if (xmlDoc != null)
		{
			var imsrc = xmlDoc.getElementsByTagName("world-map")[0].getAttribute("src");
			imWM.src = imsrc;
		}
		else
			imWM.src = defaultMap;
	}
	else
		imWM.src = defaultMap;
	waitIm.src = '';
}