var xmlhttp1;
var xmlhttp2;

function GetXmlHttpObject() {

	if (window.XMLHttpRequest) {
  		// code for IE7+, Firefox, Chrome, Opera, Safari
  		return new XMLHttpRequest();
  	}

	if (window.ActiveXObject) {
  		// code for IE6, IE5
  		return new ActiveXObject("Microsoft.XMLHTTP");
  	}
	return null;
}


function showCategory(keyword,loc) {

	xmlhttp1 = GetXmlHttpObject();

	if (xmlhttp1 == null) {
  		alert ("Browser does not support HTTP Request");
  		return;
  	}

	var url = "ajax_category.php";
	url = url+"?keyword=" + keyword + '&location=' + loc;

	// ramdom session id
	url = url + "&sid=" + Math.random();
	xmlhttp1.onreadystatechange = stateChangedCategory;
	xmlhttp1.open("GET",url,true);
	xmlhttp1.send(null);

}

function showLocation(keyword,loc) {

	xmlhttp2 = GetXmlHttpObject();

	if (xmlhttp2 == null) {
  		alert ("Browser does not support HTTP Request");
  		return;
  	}

	var url = "ajax_location.php";
	url = url+"?keyword=" + keyword + '&location=' + loc;

	// ramdom session id
	url = url + "&sid=" + Math.random();
	xmlhttp2.onreadystatechange = stateChangedLocation;
	xmlhttp2.open("GET",url,true);
	xmlhttp2.send(null);

}


function stateChangedCategory() {
	if (xmlhttp1.readyState == 4) {
		document.getElementById("resultCategory").innerHTML = xmlhttp1.responseText;
	}
}

function stateChangedLocation() {
	if (xmlhttp2.readyState == 4) {
		document.getElementById("resultLocation").innerHTML = xmlhttp2.responseText;
	}
}