function MM_openBrWindow(winURL, winName, winProperty){
  var childWin;
  childWin = window.open(winURL, winName, winProperty);
  childWin.focus();
}
<!--
function popupcentree(page,largeur,hauteur,options)
{
var top=(screen.height-hauteur)/2;
var left=(screen.width-largeur)/2;
window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}
//-->

<!--
function champsok()
{
if (document.Formu.tel.value.length == 0)
{
alert("You have not entered a proper telephone number");
return false;
}
if (document.Formu.pname.value.length == 0)
{
alert("You have not entered your own name, Thank you");
return false;
}
if (document.Formu.fname.value.length == 0)
{
alert("You have not entered your friend's name, Thank you");
return false;
}
if (document.Formu.comp.value.length == 0)
{
alert("You have not entered your friend's company name, Thank you");
return false;
}
if (document.Formu.strmail.value.length == 0)
{
alert("You have not entered your friends email addresse, Thank you");
return false;
}
return true;
}
//-->
<!--
// Secondes avant la fermeture automatique de la popup (si 0, la popup n'est pas fermée)
closetime = 30; 
function Start(URL, WIDTH, HEIGHT) {
windowprops = "left=50,top=50,width=" + WIDTH + ",height=" + HEIGHT;
preview = window.open(URL, "preview", windowprops);
if (closetime) setTimeout("preview.close();", closetime*1000);
}
//-->
<!--
function Lance_Popup() {
url = "popEvent.html";
width = 300;  // Largeur de la popup en pixels
height = 230; // Hauteur de la popup en pixels
delay = 1;    // Secondes avant l'ouverture de la popup
timer = setTimeout("Start(url, width, height)", delay*1000);
}
//-->