function handleHttpResponse() {
	if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
		var xmlDoc = xmlHttp.responseXML;
		if (xmlDoc.documentElement) {
			var free    = xmlDoc.getElementsByTagName('free').item(0).firstChild;
			if (free    != null) document.getElementById('free').value = free.data;
		} else {
			document.getElementById('free').value = '';
		}
	}
}

function getAddrss() {
	var postal = document.getElementById('postal').value;
	xmlHttp.open('GET', '../system/main/zip.php?zip=' + escape(postal), true);
	xmlHttp.onreadystatechange = handleHttpResponse;
	xmlHttp.send(null);
}

function getXmlHttpObject() {
	var xmlhttp;
	/*@cc_on
	@if (@_jscript_version >= 5)
		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (E) {
				xmlhttp = false;
			}
		}
	@else
		xmlhttp = false;
	@end @*/
	if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
		try {
			xmlhttp = new XMLHttpRequest();
			xmlhttp.overrideMimeType("text/xml"); 
		} catch (e) {
			xmlhttp = false;
		}
	}
	return xmlhttp;
}

var xmlHttp = getXmlHttpObject();