function getXMLHttpRequest() {
        var xhr = null;
 
        if(window.XMLHttpRequest || window.ActiveXObject) {
                if(window.ActiveXObject) {
                        try {
                                xhr = new ActiveXObject("Msxml2.XMLHTTP");
                        } catch(e) {
                                xhr = new ActiveXObject("Microsoft.XMLHTTP");
                        }
                } else {
                        xhr = new XMLHttpRequest();
                }
        } else {
                alert("Votre navigateur ne supporte pas l'objet XMLHTTPRequest..."); //
                return null;
        }
 
        return xhr;
}
function ajax_verif(input, rendu, transmis, php, variable) {
var xhr = getXMLHttpRequest();
var value = document.getElementById(input);
if(xhr && xhr.readyState != 0) {
xhr.abort();
}
xhr.onreadystatechange = function() 
{
	if(xhr.readyState == 4 && (xhr.status == 200 || xhr.status == 0)) 
	{
		document.getElementById(rendu).innerHTML = xhr.responseText;
	}
}
xhr.open("POST", php+"?var="+variable, true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.send(transmis + "=" + value);
}