function check_email(str)    
{ if (str.length==0)
    return true;

  ereg=new RegExp("^.+@.+\\..+$");
  return ereg.test(str);  
} 

function test_email(em)
{ if (!(check_email(em.value)))
    confirm('Your e-mail address appears to be incorrect');
}

function calc(form)
{ tot=0;

  if (form.Track1.checked)
    tot++;
  if (form.Track2.checked)
    tot++;
  if (form.Track3.checked)
    tot++;
  if (form.Track4.checked)
    tot++;
  if (form.Track5.checked)
    tot++;
  if (form.CD.checked)
    tot+=5;

  if (tot==0)
    form.total.value='';
  else
  { s=tot.toString()+'.00';
    form.total.value=s;
  }
  form.amount.value=form.total.value;
//  form.amount.value=0.01;
}

function settransactionfields(form)
{ calc(form);
  bf=0;
  
  if (form.Track1.checked)
    bf+=1;
  if (form.Track2.checked)
    bf+=2;
  if (form.Track3.checked)
    bf+=4;
  if (form.Track4.checked)
    bf+=8;
  if (form.Track5.checked)
    bf+=16;
  if (form.CD.checked)
    bf+=32;

  form.item_number.value=bf;
  
  form.custom.value=form.address1.value;
  if (form.address2.value.length>0)
    form.custom.value+='\r\n'+form.address2.value;
  if (form.city.value.length>0)
    form.custom.value+='\r\n'+form.city.value;
  if (form.zip.value.length>0)
    form.custom.value+='\r\n'+form.zip.value;
  if (form.country.value.length>0)
    form.custom.value+='\r\n'+form.country.value;
}

function saverec(form)
{ settransactionfields(form);

  if (form.total.value==0) 
  { alert('You haven\'t ordered anything');
    return;
  }
  
  if ((form.CD.checked) && (form.address1.value.length==0))
  { confirm("Please enter your address");
    form.address1.focus();
  }

  else if ((form.Track1.checked) || (form.Track2.checked) || (form.Track3.checked) || (form.Track4.checked) || (form.Track5.checked))
  { if ((form.email.value.length==0) || (!check_email(form.email.value)))
    { alert("Please check your e-mail address");
      form.email.focus();
    }
    else
      form.submit();
  }

  else
    form.submit();
}