// Browser detection
var n4=window.Event ? true : false; // NN4 ou plus
var ns4=document.layers;
var ie4=document.all;
var ns6=document.getElementById&&!document.all;

if (navigator.userAgent.indexOf('Opera')>=0) var opera = true;
if (opera && parseInt(navigator.appVersion) < 6) var opera5 = true;

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == 'Netscape' && browserVer >= 3) version = 'BROWSER_n3';
else if (browserName == 'Netscape' && browserVer < 3) version = 'BROWSER_n2';
else if (browserName == 'Microsoft Internet Explorer' && browserVer >= 4) version = 'BROWSER_e4';
else if (browserName == 'Microsoft Internet Explorer' && browserVer < 4) version = 'BROWSER_e3';
else if (navigator.userAgent.indexOf('Opera')>=0) version = 'BROWSER_e4';

// ouvrir une popup sans l'adresse mais avec scrolling
function OpenPopUp3(MyFile,MyWindow,MyWidth,MyHeight) {
   var xMax, yMax, xOffset, yOffset;
    if (ie4 || ns6) {
        xMax = screen.width;
        yMax = screen.height;
    } else if (ns4) {
        xMax = window.outerWidth;
        yMax = window.outerHeight;
    } else {
        xMax = 800;
        yMax = 600;
    }
    xOffset = (xMax - MyWidth)/2;
    yOffset = (yMax - MyHeight)/2;

    var PAGE = window.open(MyFile,MyWindow,'width='+MyWidth +',height='+MyHeight +',screenX='+xOffset +',screenY='+yOffset +',top='+yOffset +',left='+xOffset +',resizable=yes,scrollbars=yes');
    if (PAGE && PAGE.blur) PAGE.focus();
}

// Verifie la validite d'un email
function VerifEmail(email) {
  var verif = /[_\.0-9a-z-]+@([0-9a-z][0-9a-z.-]+\.)+[a-z]{2,4}$/
  if (verif.exec(email) == null) 
 return false;
  else 
 return true;
}