function getHttpObject() {

	var xmlhttp;
	
	if (window.XMLHttpRequest) {
		try {
			xmlhttp = new XMLHttpRequest();
		} catch (e) {
			xmlhttp = false;
		}
	}else if (window.ActiveXObject){
		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e){
			try {
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (E){
				xmlhttp = false;
			}
		}
	}
	return xmlhttp;
}

function addListener(obj, eventType, func, cap){
	if(obj.attachEvent){
		obj.attachEvent('on' + eventType, func);
	}else if(obj.addEventListener){
		obj.addEventListener(eventType, func, cap);
	}else {
		alert('No support on your Browser');
		return false;
	}
}