function doInvite()
{
	if (document.all.ename.value == '')
	{
		alert('Some data has not been supplied!');
		return false;
	}
	else
	{
		var nLeft = (window.screen.availWidth - 900)/2;
		var nTop = (window.screen.availHeight - 600)/2;
		var winInvite = window.open('',
		                            'objInvite',
		                            'resizeable=yes,scrollbars=yes,width=550,height=625,top=' + nTop + ',left=' + nLeft,
		                            true);

		document.all.frmInvite.target = 'objInvite';
		document.all.frmInvite.submit();
		winInvite.focus();
	}

	return true;
}