function addEmail()
{
if (parseInt(navigator.appVersion)>3) {
 if (navigator.appName=="Netscape") {
  winW = window.innerWidth;
  winH = window.innerHeight;
 }
 if (navigator.appName.indexOf("Internet")!=-1) {
  winW = document.body.offsetWidth;
  winH = document.body.offsetHeight;
 }
}
	myLightWindow.activateWindow({
		href: 'facebook.php?rand=<?php echo rand(0,100000);?>&email='+document.myform.email.value, 
		title: 'Rejoignez le groupe facebook', 
		author:"",
		left:winW/2,
		width:400,
		height:150
		
		})
	document.myform.email.value="";
}