var http_request = false;

function makeRequest(url, parameters,function_replay) 
{
	http_request = false;
	if (window.XMLHttpRequest) 
	{
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) 
		{
			http_request.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject) 
	{
		try 
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e) 
		{
			try 
			{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) 
			{}
		}
	}

	if (!http_request) 
	{
		alert('Cannot create XMLHTTP instance');
		return false;
	}

	eval("http_request.onreadystatechange = "+function_replay+";");
	http_request.open('GET', url + parameters, true);
	http_request.send(null);
}

function makeRequestPost(p_url, parameters,function_replay) 
{
 http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
	eval("http_request.onreadystatechange = "+function_replay+";");

	http_request.open('POST', p_url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	//http_request.setRequestHeader("Content-length", parameters.length);
	//http_request.setRequestHeader("Connection", "close");
	parameters = encodeURIComponent(parameters);
	http_request.send('xml='+parameters);
}