function openPopup(windowURL, windowName, windowFeatures) { 
	return window.open(windowURL, windowName, windowFeatures); 
} 

function openTipFriend(url) {
	openPopup(url, 'tipFriend', 'width=400,height=400,status=no,location=no,menubar=no,scrollbars=no,toolbar=no,resizable=no');
}

function contactpopup(myform)
{
	if (!window.focus) return true;
	windowname='contact';
	window.open('', windowname, 'width=384,height=420,status=no,location=no,menubar=no,scrollbars=no,toolbar=no,resizable=no');
	myform.target=windowname;
	return true;
}