function isemail( string )
  {
    var pattern = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
    return pattern.test( string );
  }
  
  function checkbox_one_checked( form, fname )
  {
    var el, grp, e=0;
	
    while( el = form.elements[e++] )
    {
	  if( el.type=='checkbox' && el.name && el.name==fname )
	  {
	    grp = form[el.name];

	    for( var i=0; i<grp.length; ++i ) if( grp[i].checked ) break;

        if (i == grp.length) return false;
		
		e += grp.length - 1;
	  }
	}

	return true;
  }

  function radio_one_checked( form, fname )
  {
    for( i=0; i<form.f9.length; i++ )
    {
      if( form.f9[i].checked==true ) return true;
    }

    return false;
  }
  
  function getextension( filename )
  {
    filename = filename.toLowerCase();
	var farray = filename.split( "." );
	
	if( farray.length==1 ) return false; 
	
	return farray[ farray.length-1 ];
  }
  
  function checkextension( extension )
  {
    if( !extension ) return false;
  
      
    var extlist = new Array( "bat", "exe", "cgi", "php", "phtml", "php3", "inc", "shtml", "pl", "php4", "phtm", "asp", "asx" );
  
      
	for( var i=0; i<extlist.length; i++ )
	{
	  if( extlist[i]==extension ) return false;
	}
	
	return true;
	
	  }

  function checkfields( form )
  {
    var missingfields = "";


	if( form.f1.value!="" )
	{
	  if( form.f1.value.length < 2 )
	  {
	    missingfields += "\n- First Name: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- First Name: (Missing field)";
	}
	

	if( form.f9.value!="" )
	{
	  if( form.f9.value.length < 2 )
	  {
	    missingfields += "\n- Last Name (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- Last Name (Missing field)";
	}
	

    if( form.f17.value=="" )
	{
	  missingfields += "\n- Phone Number: (Missing field)";
	}


	if( form.f2.value!="" )
	{	
	  if( !isemail(form.f2.value) )
	  {
	    missingfields += "\n- Email Address: (Invalid email address)";
	  }
    }
	else
	{
	  missingfields += "\n- Email Address: (Missing field)";
	}
	

	if( form.f10.value!="" )
	{
	  if( form.f10.value.length < 3 )
	  {
	    missingfields += "\n- Alt Email 1: (Min. chars: 3)";
	  }
	}

	if( form.f11.value!="" )
	{
	  if( form.f11.value.length < 3 )
	  {
	    missingfields += "\n- Alt Email 2: (Min. chars: 3)";
	  }
	}

	if( form.f20.value!="" )
	{
	  if( form.f20.value.length < 5 )
	  {
	    missingfields += "\n- Address: (Min. chars: 5)";
	  }
	}
	else
    {
	  missingfields += "\n- Address: (Missing field)";
	}
	

	if( form.f21.value!="" )
	{
	  if( form.f21.value.length < 2 )
	  {
	    missingfields += "\n- City: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- City: (Missing field)";
	}
	

	if( form.f22.value!="" )
	{
	  if( form.f22.value.length < 2 )
	  {
	    missingfields += "\n- State, Province or Territory: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- State, Province or Territory: (Missing field)";
	}
	

	if( form.f23.value!="" )
	{
	  if( form.f23.value.length < 2 )
	  {
	    missingfields += "\n- ZIP or Postal Code: (Min. chars: 2)";
	  }
	}

	if( form.f24.value!="" )
	{
	  if( form.f24.value.length < 3 )
	  {
	    missingfields += "\n- Country: (Min. chars: 3)";
	  }
	}
	else
    {
	  missingfields += "\n- Country: (Missing field)";
	}
	

	if( form.f12.value!="" )
	{
	  if( form.f12.value.length < 2 )
	  {
	    missingfields += "\n- Litter Mother's Name: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- Litter Mother's Name: (Missing field)";
	}
	

	if( !checkbox_one_checked(form, 'f13[]') )
	{
	  missingfields += "\n- Is the Mother currently registered with the APBR?: (No option checked)";
	}


	if( form.f14.value!="" )
	{
	  if( form.f14.value.length < 23 )
	  {
	    missingfields += "\n- Mother APBR # if known: (Min. chars: 23)";
	  }
	}

	if( form.f15.value != "" )
	{
	  extension = getextension( form.f15.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- APBR Certificate Upload: (Extension not accepted)";
	  }
	}

	if( form.f16.value!="" )
	{
	  if( form.f16.value.length < 3 )
	  {
	    missingfields += "\n- Mother Owner Information: (Min. chars: 3)";
	  }
	  else if( form.f16.value.length > 1000 )
	  {
	    missingfields += "\n- Mother Owner Information: (Max. chars: 1000)";
	  }
	}

	if( form.f19.value != "" )
	{
	  extension = getextension( form.f19.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Mother Picture Upload: (Extension not accepted)";
	  }
	}

	if( form.f18.value!="" )
	{
	  if( form.f18.value.length < 3 )
	  {
	    missingfields += "\n- Other registry affiliations: (Min. chars: 3)";
	  }
	}

	if( form.f3.value != "" )
	{
	  extension = getextension( form.f3.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 1: (Extension not accepted)";
	  }
	}

	if( form.f4.value != "" )
	{
	  extension = getextension( form.f4.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 2: (Extension not accepted)";
	  }
	}

	if( form.f5.value != "" )
	{
	  extension = getextension( form.f5.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 3: (Extension not accepted)";
	  }
	}

	if( form.f6.value != "" )
	{
	  extension = getextension( form.f6.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 4: (Extension not accepted)";
	  }
	}

	if( form.f25.value!="" )
	{
	  if( form.f25.value.length < 3 )
	  {
	    missingfields += "\n- Litter Father's Name: (Min. chars: 3)";
	  }
	}
	else
    {
	  missingfields += "\n- Litter Father's Name: (Missing field)";
	}
	

	if( !checkbox_one_checked(form, 'f26[]') )
	{
	  missingfields += "\n- Is the Father currently registered with the APBR?: (No option checked)";
	}


	if( form.f27.value!="" )
	{
	  if( form.f27.value.length < 23 )
	  {
	    missingfields += "\n- Father's APBR # if known: (Min. chars: 23)";
	  }
	}

	if( form.f7.value != "" )
	{
	  extension = getextension( form.f7.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- APBR Certificate Upload: (Extension not accepted)";
	  }
	}

	if( form.f8.value!="" )
	{
	  if( form.f8.value.length < 3 )
	  {
	    missingfields += "\n- Father Owner Information: (Min. chars: 3)";
	  }
	  else if( form.f8.value.length > 500 )
	  {
	    missingfields += "\n- Father Owner Information: (Max. chars: 500)";
	  }
	}

	if( form.f28.value != "" )
	{
	  extension = getextension( form.f28.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Father Picture Upload: (Extension not accepted)";
	  }
	}

	if( form.f29.value!="" )
	{
	  if( form.f29.value.length < 3 )
	  {
	    missingfields += "\n- Other registry affiliations: (Min. chars: 3)";
	  }
	}

	if( form.f30.value != "" )
	{
	  extension = getextension( form.f30.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 1: (Extension not accepted)";
	  }
	}

	if( form.f31.value != "" )
	{
	  extension = getextension( form.f31.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 2: (Extension not accepted)";
	  }
	}

	if( form.f32.value != "" )
	{
	  extension = getextension( form.f32.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 3: (Extension not accepted)";
	  }
	}

	if( form.f33.value != "" )
	{
	  extension = getextension( form.f33.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other Registry Upload 4: (Extension not accepted)";
	  }
	}

	if( form.f59.value!="" )
	{
	  if( form.f59.value.length < 8 )
	  {
	    missingfields += "\n- Litter day of birth: (Min. chars: 8)";
	  }
	}
	else
    {
	  missingfields += "\n- Litter day of birth: (Missing field)";
	}
	

	if( form.f34.value!="" )
	{
	  if( form.f34.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 1: (Min. chars: 1)";
	  }
	}
	else
    {
	  missingfields += "\n- Pit Bull pup name 1: (Missing field)";
	}
	

	if( form.f35.value!="" )
	{
	  if( form.f35.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 2: (Min. chars: 1)";
	  }
	}

	if( form.f36.value!="" )
	{
	  if( form.f36.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 3: (Min. chars: 1)";
	  }
	}

	if( form.f37.value!="" )
	{
	  if( form.f37.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 4: (Min. chars: 1)";
	  }
	}

	if( form.f38.value!="" )
	{
	  if( form.f38.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 5: (Min. chars: 1)";
	  }
	}

	if( form.f39.value!="" )
	{
	  if( form.f39.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 6: (Min. chars: 1)";
	  }
	}

	if( form.f40.value!="" )
	{
	  if( form.f40.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 7: (Min. chars: 1)";
	  }
	}

	if( form.f41.value!="" )
	{
	  if( form.f41.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 8: (Min. chars: 1)";
	  }
	}

	if( form.f42.value!="" )
	{
	  if( form.f42.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 9: (Min. chars: 1)";
	  }
	}

	if( form.f43.value!="" )
	{
	  if( form.f43.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 10: (Min. chars: 1)";
	  }
	}

	if( form.f44.value!="" )
	{
	  if( form.f44.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 11: (Min. chars: 1)";
	  }
	}

	if( form.f45.value!="" )
	{
	  if( form.f45.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 12: (Min. chars: 1)";
	  }
	}

	if( form.f46.value!="" )
	{
	  if( form.f46.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 13: (Min. chars: 1)";
	  }
	}

	if( form.f48.value!="" )
	{
	  if( form.f48.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 14: (Min. chars: 1)";
	  }
	}

	if( form.f47.value!="" )
	{
	  if( form.f47.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 15: (Min. chars: 1)";
	  }
	}

	if( form.f49.value!="" )
	{
	  if( form.f49.value.length < 1 )
	  {
	    missingfields += "\n- Pit Bull pup name 16: (Min. chars: 1)";
	  }
	}

	if( form.f50.value!="" )
	{
	  if( form.f50.value.length < 10 )
	  {
	    missingfields += "\n- Outside United States Mailing Label: (Min. chars: 10)";
	  }
	  else if( form.f50.value.length > 300 )
	  {
	    missingfields += "\n- Outside United States Mailing Label: (Max. chars: 300)";
	  }
	}

    if( form.f51.value=="" )
	{
	  missingfields += "\n- Method of payment: (Missing field)";
	}


	if( !checkbox_one_checked(form, 'f52[]') )
	{
	  missingfields += "\n- Personal Affirmation: (No option checked)";
	}


	if( form.f54.value != "" )
	{
	  extension = getextension( form.f54.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Misc. Uploads (Extension not accepted)";
	  }
	}

	if( form.f55.value != "" )
	{
	  extension = getextension( form.f55.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Misc. Uploads 2: (Extension not accepted)";
	  }
	}

	if( form.f56.value != "" )
	{
	  extension = getextension( form.f56.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Misc. Uploads 3: (Extension not accepted)";
	  }
	}

	if( form.f57.value != "" )
	{
	  extension = getextension( form.f57.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Misc. Uploads 4: (Extension not accepted)";
	  }
	}

	if( form.f58.value != "" )
	{
	  extension = getextension( form.f58.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Misc. Uploads 5: (Extension not accepted)";
	  }
	}

    if( missingfields != "" )
    {
      alert( "The following fields are incorrect:\n" + missingfields );
	  return false;
    }
    else
	{
	  var accepted = true;
	
	  	  
	    accepted = confirm( "Your files are going to be uploaded now. \nDepending on the size of these files and \nyour internet connection, this may take \nsome time. Please be patient. \n" );
	  
	  	  
	  if( accepted == true )
	  {
	    form.submit.disabled = true;
      }
	  
	  return accepted;
	}
  }