function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_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_email2(field,alerttxt)
{
with (field)
  {
	if(value==null || value==""){
		return true;
	}
  apos=value.indexOf("@");
  dotpos=value.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {alert(alerttxt);return false;}
  else {return true;}
  }
}

function validate_zip(field, alerttxt)
{
	with(field)
	{
		len=value.length;
		if(len != 5 || len != 10)
		{
			alert(alerttxt);
			return false;
		} else
		{
			return true;
		}
	}
}