function CheckForm(newsletter)
{
    var is_ok = true;
	var s=document.newsletter.email.value.indexOf("@");
	var d=document.newsletter.email.value.length;
	x=d-s-1;
	    
    if (newsletter.name.value == '' || newsletter.company.value == '' || newsletter.town.value == '' || newsletter.country.value == '')
    {
    	is_ok = false;
    	alert("Please, fill up all fields.");
    	newsletter.name.focus();
	}
	
	if (x<5 || s<1)
	{
    	is_ok = false;
		alert('Error in e-mail address.');
    	newsletter.email.focus();
	}
	
return is_ok;
}