document.onkeypress = function(e) {
    if (e.type == "keypress" & e.keyCode == 13) 
      //  alert("Please click on  'I accept terms and conditions'"); 
    return !(e.type == "keypress" & e.keyCode == 13); 
} 

function dspFile(table,file,zoom)
{
    var xhr_object = null; 

    if (window.XMLHttpRequest) xhr_object = new XMLHttpRequest();
    else if	(window.ActiveXObject) xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
    else 
    {
        alert("XMLHTTPRequest not found"); 
        return; 
    }

    xhr_object.open( "GET", "/dspFile.php?table="+table+"&file="+file+"&zoom="+zoom , true ); 
    xhr_object.onreadystatechange = function() 
    { 
        if (xhr_object.readyState == 4) 
        {
            var result = xhr_object.responseText;

            try
            {
                document.getElementById("popup").innerHTML = result; // Affichage
                document.getElementById("loading").innerHTML = ''; // Affichage
            }
            catch(err)
            {
                window.alert('WARNING : popup / loading ' + err);
            }
            
        }
    } 

    xhr_object.send(null);
}