function validate_newsletter_required(field,alerttxt)
{ 
	with (field)
	{
		if (value==null||value=="")
  			{alert(alerttxt);return false;}
		else {return true}
	}
}
function validate_newsletter_email(field,alerttxt)
{
	with (field)
	{
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) 
 			{alert(alerttxt);return false;}
		else {return true;}
	}
}
function validate_newsletter_form(thisform)
{
	with (thisform)
	{
		if (validate_newsletter_required(UserName,"Please provide a contact name")==false)
  		{UserName.focus();return false;}
		if (validate_newsletter_email(EmailAddress,"Please provide a valid email address")==false)
  		{EmailAddress.focus();return false;}
	}
}