function XmlHTTP() {
	var xmlhttp = false;
	try {
		xmlhttp = new ActiveXObject ("Msxml2.XMLHTTP"); // Browser : IE 6.0+
	} catch (e) {
		try {
			xmlhttp = new ActiveXObject ("Microsoft.XMLHTTP"); // Browser : IE 5.5+
		} catch (e) {
			try {
				xmlhttp = new XMLHttpRequest(); // Browser : Netscape, Firefox, Safari
			} catch (e) {
				xmlhttp = false;
			}
		}
	}
	
	return xmlhttp;
}