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 < 3 )
	  {
	    missingfields += "\n- First Name: (Min. chars: 3)";
	  }
	}
	else
    {
	  missingfields += "\n- First Name: (Missing field)";
	}
	

	if( form.f10.value!="" )
	{
	  if( form.f10.value.length < 2 )
	  {
	    missingfields += "\n- Last Name: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- Last Name: (Missing field)";
	}
	

	if( form.f51.value!="" )
	{
	  if( form.f51.value.length < 3 )
	  {
	    missingfields += "\n- APBR Kennel Name if any: (Min. chars: 3)";
	  }
	}

	if( form.f58.value!="" )
	{
	  if( form.f58.value.length < 7 )
	  {
	    missingfields += "\n- Phone Number: (Min. chars: 7)";
	  }
	}

	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.f52.value!="" )
	{
	  if( form.f52.value.length < 4 )
	  {
	    missingfields += "\n- Alternate Email address (if any): (Min. chars: 4)";
	  }
	}

	if( form.f53.value!="" )
	{
	  if( form.f53.value.length < 4 )
	  {
	    missingfields += "\n- 2nd Alternate Email address (if any): (Min. chars: 4)";
	  }
	}

	if( form.f11.value!="" )
	{
	  if( form.f11.value.length < 5 )
	  {
	    missingfields += "\n- Address: (Min. chars: 5)";
	  }
	}
	else
    {
	  missingfields += "\n- Address: (Missing field)";
	}
	

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

	if( form.f19.value!="" )
	{
	  if( form.f19.value.length < 2 )
	  {
	    missingfields += "\n- State, Province or Territory: (Min. chars: 2)";
	  }
	}
	else
    {
	  missingfields += "\n- State, Province or Territory: (Missing field)";
	}
	

	if( form.f14.value!="" )
	{
	  if( form.f14.value.length < 2 )
	  {
	    missingfields += "\n- ZIP or Postal Code: (Min. chars: 2)";
	  }
	}

	if( form.f15.value!="" )
	{
	  if( form.f15.value.length < 3 )
	  {
	    missingfields += "\n- Country: (Min. chars: 3)";
	  }
	}
	else
    {
	  missingfields += "\n- Country: (Missing field)";
	}
	

	if( form.f9.value!="" )
	{
	  if( form.f9.value.length < 3 )
	  {
	    missingfields += "\n- Pit Bull Name: (Min. chars: 3)";
	  }
	}
	else
    {
	  missingfields += "\n- Pit Bull Name: (Missing field)";
	}
	

	if( form.f18.value!="" )
	{
	  if( form.f18.value.length < 8 )
	  {
	    missingfields += "\n- Pit Bull's Birth Date: (Min. chars: 8)";
	  }
	}
	else
    {
	  missingfields += "\n- Pit Bull's Birth Date: (Missing field)";
	}
	

	if( form.f8.value!="" )
	{
	  if( form.f8.value.length < 4 )
	  {
	    missingfields += "\n- Your Pit Bull's Physical Description: (Min. chars: 4)";
	  }
	  else if( form.f8.value.length > 300 )
	  {
	    missingfields += "\n- Your Pit Bull's Physical Description: (Max. chars: 300)";
	  }
	}
	else
    {
	  missingfields += "\n- Your Pit Bull's Physical Description: (Missing field)";
	}
	

	if( form.f55.value!="" )
	{
	  if( form.f55.value.length < 5 )
	  {
	    missingfields += "\n- Designations and Awards: (Min. chars: 5)";
	  }
	  else if( form.f55.value.length > 300 )
	  {
	    missingfields += "\n- Designations and Awards: (Max. chars: 300)";
	  }
	}

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

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Upload your Pit Bull Front Picture here: (Extension not accepted)";
	  }
	}

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

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

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

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

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

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

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

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

	if( form.f24.value!="" )
	{
	  if( form.f24.value.length < 4 )
	  {
	    missingfields += "\n- Other registry affiliations: (Min. chars: 4)";
	  }
	}

	if( form.f21.value!="" )
	{
	  if( form.f21.value.length < 2 )
	  {
	    missingfields += "\n- Pit Bull's Mother (Dam): (Min. chars: 2)";
	  }
	}

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

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Upload picture of DAM if available: (Extension not accepted)";
	  }
	}

	if( form.f22.value!="" )
	{
	  if( form.f22.value.length < 23 )
	  {
	    missingfields += "\n- APBR Registration Number: (Min. chars: 23)";
	  }
	}

	if( form.f23.value != "" )
	{
	  extension = getextension( form.f23.value );

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

	if( form.f25.value!="" )
	{
	  if( form.f25.value.length < 4 )
	  {
	    missingfields += "\n- Other registry affiliations: (Min. chars: 4)";
	  }
	}

	if( form.f26.value != "" )
	{
	  extension = getextension( form.f26.value );

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

	if( form.f27.value != "" )
	{
	  extension = getextension( form.f27.value );

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

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

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

	if( form.f29.value != "" )
	{
	  extension = getextension( form.f29.value );

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

	if( form.f31.value!="" )
	{
	  if( form.f31.value.length < 3 )
	  {
	    missingfields += "\n- Pit Bull's Father (Sire): (Min. chars: 3)";
	  }
	}

	if( form.f34.value != "" )
	{
	  extension = getextension( form.f34.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Upload picture of Sire if available: (Extension not accepted)";
	  }
	}

	if( form.f32.value!="" )
	{
	  if( form.f32.value.length < 23 )
	  {
	    missingfields += "\n- APBR Registration Number: (Min. chars: 23)";
	  }
	}

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

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

	if( form.f35.value!="" )
	{
	  if( form.f35.value.length < 4 )
	  {
	    missingfields += "\n- Other registry affiliations: (Min. chars: 4)";
	  }
	}

	if( form.f36.value != "" )
	{
	  extension = getextension( form.f36.value );

	  if( !checkextension( extension ) )
	  {
	    missingfields += "\n- Other registry affiliation upload: (Extension not accepted)";
	  }
	}

	if( form.f37.value != "" )
	{
	  extension = getextension( form.f37.value );

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

	if( form.f38.value != "" )
	{
	  extension = getextension( form.f38.value );

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

	if( form.f39.value != "" )
	{
	  extension = getextension( form.f39.value );

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

    if( form.f56.value=="" )
	{
	  missingfields += "\n- REQUIRED REGISTRATION PICTURES provided by: (Missing field)";
	}


	if( form.f49.value!="" )
	{
	  if( form.f49.value.length < 10 )
	  {
	    missingfields += "\n- Outside United States Mailing Label: (Min. chars: 10)";
	  }
	  else if( form.f49.value.length > 300 )
	  {
	    missingfields += "\n- Outside United States Mailing Label: (Max. chars: 300)";
	  }
	}

    if( form.f59.value=="" )
	{
	  missingfields += "\n- Method of payment: (Missing field)";
	}


	if( !checkbox_one_checked(form, 'f46[]') )
	{
	  missingfields += "\n- Personal Affirmation: (No option checked)";
	}


    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;
	}
  }