function getXhr() {
	var xhr = null; 
	
	if(window.XMLHttpRequest) // Firefox et autres
	   xhr = new XMLHttpRequest(); 
	   
	else if(window.ActiveXObject){ // Internet Explorer 
	   try { xhr = new ActiveXObject("Msxml2.XMLHTTP"); }
	   catch (e) { xhr = new ActiveXObject("Microsoft.XMLHTTP"); }
	}
	
	else { // XMLHttpRequest non supporté par le navigateur 
	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
	   xhr = false; 
	} 
	
	return xhr;
}

function Open (idObject, url, option, FctComplete) {

	var xhr = getXhr();
	
	document.getElementById(idObject).innerHTML==' ';
	xhr.open("POST",url,true);
	xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xhr.send(option);
	
	xhr.onreadystatechange = function(){
		if(xhr.readyState == 4 && xhr.status == 200)
			if (xhr.responseText != "0") {

				document.getElementById(idObject).innerHTML=xhr.responseText;
				if (FctComplete)
					FctComplete(option);
			}
	}
}