function clear_continent_countries() {
	document.getElementById('country_id').length = 0;
}

function toggle_continent_country(continent) { 

	if(continent == 'Africa') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Algeria','3');document.getElementById('country_id').options[1] = new Option('Angola','6');document.getElementById('country_id').options[2] = new Option('Benin','24');document.getElementById('country_id').options[3] = new Option('Botswana','29');document.getElementById('country_id').options[4] = new Option('Burkina Faso','34');document.getElementById('country_id').options[5] = new Option('Burundi','36');document.getElementById('country_id').options[6] = new Option('Cameroon','38');document.getElementById('country_id').options[7] = new Option('Cape Verde Island','40');document.getElementById('country_id').options[8] = new Option('Central African Republic','42');document.getElementById('country_id').options[9] = new Option('Chad','43');document.getElementById('country_id').options[10] = new Option('Comoros','48');document.getElementById('country_id').options[11] = new Option('Congo','49');document.getElementById('country_id').options[12] = new Option('Djibouti','59');document.getElementById('country_id').options[13] = new Option('Dominican Republic','61');document.getElementById('country_id').options[14] = new Option('Egypt','63');document.getElementById('country_id').options[15] = new Option('Equatorial Guinea','65');document.getElementById('country_id').options[16] = new Option('Eritrea','68');document.getElementById('country_id').options[17] = new Option('Ethiopia','67');document.getElementById('country_id').options[18] = new Option('Gabonese Republic','77');document.getElementById('country_id').options[19] = new Option('Gambia','78');document.getElementById('country_id').options[20] = new Option('Ghana','81');document.getElementById('country_id').options[21] = new Option('Guinea','90');document.getElementById('country_id').options[22] = new Option('Guinea-Bissau','91');document.getElementById('country_id').options[23] = new Option('Ivory Coast','104');document.getElementById('country_id').options[24] = new Option('Kenya','109');document.getElementById('country_id').options[25] = new Option('Lesotho','118');document.getElementById('country_id').options[26] = new Option('Liberia','119');document.getElementById('country_id').options[27] = new Option('Libya','120');document.getElementById('country_id').options[28] = new Option('Madagascar','126');document.getElementById('country_id').options[29] = new Option('Malawi','127');document.getElementById('country_id').options[30] = new Option('Mali','130');document.getElementById('country_id').options[31] = new Option('Mauritania','133');document.getElementById('country_id').options[32] = new Option('Mauritius','134');document.getElementById('country_id').options[33] = new Option('Morocco','142');document.getElementById('country_id').options[34] = new Option('Mozambique','143');document.getElementById('country_id').options[35] = new Option('Namibia','145');document.getElementById('country_id').options[36] = new Option('Niger','153');document.getElementById('country_id').options[37] = new Option('Nigeria','154');document.getElementById('country_id').options[38] = new Option('Reunion Island','172');document.getElementById('country_id').options[39] = new Option('Rwanda','175');document.getElementById('country_id').options[40] = new Option('Senegal','186');document.getElementById('country_id').options[41] = new Option('Seychelles','188');document.getElementById('country_id').options[42] = new Option('Sierra Leone','189');document.getElementById('country_id').options[43] = new Option('Somalia','194');document.getElementById('country_id').options[44] = new Option('South Africa','195');document.getElementById('country_id').options[45] = new Option('Sudan','198');document.getElementById('country_id').options[46] = new Option('Swaziland','200');document.getElementById('country_id').options[47] = new Option('Tanzania','206');document.getElementById('country_id').options[48] = new Option('Togo','208');document.getElementById('country_id').options[49] = new Option('Tunisia','211');document.getElementById('country_id').options[50] = new Option('Uganda','216');document.getElementById('country_id').options[51] = new Option('Zambia','231');document.getElementById('country_id').options[52] = new Option('Zimbabwe','232');	}
    
	if(continent == 'Europe') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Albania','2');document.getElementById('country_id').options[1] = new Option('Andorra','5');document.getElementById('country_id').options[2] = new Option('Armenia','11');document.getElementById('country_id').options[3] = new Option('Austria','15');document.getElementById('country_id').options[4] = new Option('Azerbaijan','16');document.getElementById('country_id').options[5] = new Option('Belarus','21');document.getElementById('country_id').options[6] = new Option('Belgium','22');document.getElementById('country_id').options[7] = new Option('Bosnia-Herzegovina','28');document.getElementById('country_id').options[8] = new Option('Bulgaria','33');document.getElementById('country_id').options[9] = new Option('Croatia','52');document.getElementById('country_id').options[10] = new Option('Cyprus','55');document.getElementById('country_id').options[11] = new Option('Czech Republic','56');document.getElementById('country_id').options[12] = new Option('Denmark','57');document.getElementById('country_id').options[13] = new Option('Estonia','66');document.getElementById('country_id').options[14] = new Option('Faeroe Islands','69');document.getElementById('country_id').options[15] = new Option('Finland','72');document.getElementById('country_id').options[16] = new Option('France','73');document.getElementById('country_id').options[17] = new Option('Georgia','79');document.getElementById('country_id').options[18] = new Option('Germany','80');document.getElementById('country_id').options[19] = new Option('Gibraltar','82');document.getElementById('country_id').options[20] = new Option('Greece','83');document.getElementById('country_id').options[21] = new Option('Hungary','96');document.getElementById('country_id').options[22] = new Option('Iceland','97');document.getElementById('country_id').options[23] = new Option('Ireland','102');document.getElementById('country_id').options[24] = new Option('Italy','103');document.getElementById('country_id').options[25] = new Option('Kazakhstan','108');document.getElementById('country_id').options[26] = new Option('Latvia','116');document.getElementById('country_id').options[27] = new Option('Liechtenstein','121');document.getElementById('country_id').options[28] = new Option('Lithuania','122');document.getElementById('country_id').options[29] = new Option('Luxembourg','123');document.getElementById('country_id').options[30] = new Option('Macedonia','125');document.getElementById('country_id').options[31] = new Option('Malta','131');document.getElementById('country_id').options[32] = new Option('Moldova','138');document.getElementById('country_id').options[33] = new Option('Monaco','139');document.getElementById('country_id').options[34] = new Option('Netherlands','148');document.getElementById('country_id').options[35] = new Option('Norway','158');document.getElementById('country_id').options[36] = new Option('Poland','168');document.getElementById('country_id').options[37] = new Option('Portugal','169');document.getElementById('country_id').options[38] = new Option('Romania','173');document.getElementById('country_id').options[39] = new Option('Russia','174');document.getElementById('country_id').options[40] = new Option('San Marino','183');document.getElementById('country_id').options[41] = new Option('Serbia and Montenegro','187');document.getElementById('country_id').options[42] = new Option('Slovakia','191');document.getElementById('country_id').options[43] = new Option('Slovenia','192');document.getElementById('country_id').options[44] = new Option('Spain','196');document.getElementById('country_id').options[45] = new Option('Sweden','201');document.getElementById('country_id').options[46] = new Option('Switzerland','202');document.getElementById('country_id').options[47] = new Option('Turkey','212');document.getElementById('country_id').options[48] = new Option('Ukraine','217');document.getElementById('country_id').options[49] = new Option('United Kingdom','219');document.getElementById('country_id').options[50] = new Option('Vatican City','225');	}
   
    if(continent == 'Australasia') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Australia','14');document.getElementById('country_id').options[1] = new Option('New Zealand','151');document.getElementById('country_id').options[2] = new Option('Papua New Guinea','164');	}
    
    if(continent == 'Asia') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Afghanistan','1');document.getElementById('country_id').options[1] = new Option('Bahrain','18');document.getElementById('country_id').options[2] = new Option('Bangladesh','19');document.getElementById('country_id').options[3] = new Option('Bhutan','26');document.getElementById('country_id').options[4] = new Option('Brunei','32');document.getElementById('country_id').options[5] = new Option('Burma','35');document.getElementById('country_id').options[6] = new Option('Cambodia','37');document.getElementById('country_id').options[7] = new Option('China','45');document.getElementById('country_id').options[8] = new Option('Hong Kong','95');document.getElementById('country_id').options[9] = new Option('India','98');document.getElementById('country_id').options[10] = new Option('Indonesia','99');document.getElementById('country_id').options[11] = new Option('Iran','100');document.getElementById('country_id').options[12] = new Option('Iraq','101');document.getElementById('country_id').options[13] = new Option('Japan','106');document.getElementById('country_id').options[14] = new Option('Jordan','107');document.getElementById('country_id').options[15] = new Option('Korea, North','111');document.getElementById('country_id').options[16] = new Option('Korea, South','112');document.getElementById('country_id').options[17] = new Option('Kuwait','113');document.getElementById('country_id').options[18] = new Option('Kyrgyzstan','114');document.getElementById('country_id').options[19] = new Option('Laos','115');document.getElementById('country_id').options[20] = new Option('Lebanon','117');document.getElementById('country_id').options[21] = new Option('Malaysia','128');document.getElementById('country_id').options[22] = new Option('Maldives','129');document.getElementById('country_id').options[23] = new Option('Mongolia','140');document.getElementById('country_id').options[24] = new Option('Myanmar','144');document.getElementById('country_id').options[25] = new Option('Nepal','147');document.getElementById('country_id').options[26] = new Option('Oman','159');document.getElementById('country_id').options[27] = new Option('Pakistan','160');document.getElementById('country_id').options[28] = new Option('Palestine','233');document.getElementById('country_id').options[29] = new Option('Philippines','167');document.getElementById('country_id').options[30] = new Option('Qatar','171');document.getElementById('country_id').options[31] = new Option('Saudi Arabia','185');document.getElementById('country_id').options[32] = new Option('Singapore','190');document.getElementById('country_id').options[33] = new Option('Sri Lanka','197');document.getElementById('country_id').options[34] = new Option('Syria','203');document.getElementById('country_id').options[35] = new Option('Taiwan','204');document.getElementById('country_id').options[36] = new Option('Tajikistan','205');document.getElementById('country_id').options[37] = new Option('Thailand','207');document.getElementById('country_id').options[38] = new Option('Turkmenistan','213');document.getElementById('country_id').options[39] = new Option('UAE','218');document.getElementById('country_id').options[40] = new Option('Uzbekistan Tashkent','223');document.getElementById('country_id').options[41] = new Option('Vietnam','227');document.getElementById('country_id').options[42] = new Option('Yemen','230');	}
    
    if(continent == 'NorthAmerica') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Anguilla','7');document.getElementById('country_id').options[1] = new Option('Aruba','12');document.getElementById('country_id').options[2] = new Option('Bahamas','17');document.getElementById('country_id').options[3] = new Option('Barbados','20');document.getElementById('country_id').options[4] = new Option('Belize','23');document.getElementById('country_id').options[5] = new Option('Bermuda','25');document.getElementById('country_id').options[6] = new Option('British Virgin Islands','31');document.getElementById('country_id').options[7] = new Option('Canada','39');document.getElementById('country_id').options[8] = new Option('Cayman Islands','41');document.getElementById('country_id').options[9] = new Option('Costa Rica','51');document.getElementById('country_id').options[10] = new Option('Cuba','53');document.getElementById('country_id').options[11] = new Option('Dominica','60');document.getElementById('country_id').options[12] = new Option('El Salvador','64');document.getElementById('country_id').options[13] = new Option('Greenland','84');document.getElementById('country_id').options[14] = new Option('Grenada','85');document.getElementById('country_id').options[15] = new Option('Guadeloupe','86');document.getElementById('country_id').options[16] = new Option('Haiti','93');document.getElementById('country_id').options[17] = new Option('Honduras','94');document.getElementById('country_id').options[18] = new Option('Jamaica','105');document.getElementById('country_id').options[19] = new Option('Mexico','136');document.getElementById('country_id').options[20] = new Option('Montserrat','141');document.getElementById('country_id').options[21] = new Option('Netherlands Antilles','149');document.getElementById('country_id').options[22] = new Option('Nicaragua','152');document.getElementById('country_id').options[23] = new Option('Panama','163');document.getElementById('country_id').options[24] = new Option('Puerto Rico','170');document.getElementById('country_id').options[25] = new Option('St. Kitts and Nevis','178');document.getElementById('country_id').options[26] = new Option('St. Lucia','179');document.getElementById('country_id').options[27] = new Option('St. Pierre and Miguelon','181');document.getElementById('country_id').options[28] = new Option('St. Vincent','182');document.getElementById('country_id').options[29] = new Option('Trinidad and Tobago','210');document.getElementById('country_id').options[30] = new Option('Turks and Caicos','214');document.getElementById('country_id').options[31] = new Option('U.S. Virgin Islands','222');document.getElementById('country_id').options[32] = new Option('USA','220');	}
    
    if(continent == 'SouthAmerica') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Argentina','10');document.getElementById('country_id').options[1] = new Option('Bolivia','27');document.getElementById('country_id').options[2] = new Option('Brazil','30');document.getElementById('country_id').options[3] = new Option('Chile','44');document.getElementById('country_id').options[4] = new Option('Colombia','47');document.getElementById('country_id').options[5] = new Option('Ecuador','62');document.getElementById('country_id').options[6] = new Option('French Guiana','75');document.getElementById('country_id').options[7] = new Option('Guyana','92');document.getElementById('country_id').options[8] = new Option('Paraguay','165');document.getElementById('country_id').options[9] = new Option('Peru','166');document.getElementById('country_id').options[10] = new Option('Suriname','199');document.getElementById('country_id').options[11] = new Option('Uruguay','221');document.getElementById('country_id').options[12] = new Option('Venezuela','226');	}
    
    if(continent == 'Antarctica') { 
		clear_continent_countries();
		document.getElementById('country_id').options[0] = new Option('Antarctica','8');	}  
}