function getXhr(){var xhr = null;if(window.XMLHttpRequest)xhr = new XMLHttpRequest();else if(window.ActiveXObject){try {xhr = new XMLHttpRequest();xhr = new ActiveXObject("Msxml2.XMLHTTP");} catch (e) {xhr = new XMLHttpRequest();xhr = new ActiveXObject("Microsoft.XMLHTTP");}}else {alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");xhr = false;}return xhr;}

function coter(code) {
  var xhr = getXhr();
	document.getElementById('maincontent').style.display='none';
	document.getElementById('wait').style.display='block';
  xhr.open('GET','cote.php?code=' + (code ? code:document.getElementById('f2-nom').value),true);
  xhr.onreadystatechange = function() {
    if(xhr.readyState==4 && xhr.status==200) {
      document.getElementById('maincontent').innerHTML = xhr.responseText;
      document.getElementById('wait').style.display='none';
      new Effect.Appear(document.getElementById('maincontent'));
    }
  }
  xhr.send(null);  
}