var httpRequest = false;

   function file(url) {

        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // Voir la note ci-dessous à propos de cette ligne
            }
        }
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Abandon :( Impossible de créer une instance XMLHTTP');
            return false;
        }
        if(httpRequest.overrideMimeType){
	        httpRequest.overrideMimeType('html/javascript');
	    }
        httpRequest.open('GET', url, true);
        httpRequest.send(null);
        httpRequest.onreadystatechange = function() 
        {
	        if (httpRequest.readyState == 4) {
	            if (httpRequest.status == 200) {
	        		eval(httpRequest.responseText);
	            } 
	        }
        }
    }
      
    function filepost(url,param) {

        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // Voir la note ci-dessous à propos de cette ligne
            }
        }
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Abandon :( Impossible de créer une instance XMLHTTP');
            return false;
        }
        if(httpRequest.overrideMimeType){
	        httpRequest.overrideMimeType('html/javascript');
	    }
        httpRequest.open('POST', url, true);
        httpRequest.setRequestHeader('Content-Type','application/x-www-form-urlencoded');		
        httpRequest.send("message="+param);
        httpRequest.onreadystatechange = function() 
        {
	        if (httpRequest.readyState == 4) {
	            if (httpRequest.status == 200) {
	        		eval(httpRequest.responseText);
	            } 
	        }
        }
    }