[SOLVED] using a dropdown

contra10 · January 21, 2009

I have a dropdown menue that populates when option one is selected...how can I create a thrid option ...dropdown one output dropdown two and dropdown 2 outputs dropdown 3... I also want to use php to enter it into mysql if that is possible

<script type="text/javascript">
function setOptions(chosen) {
var selbox = document.myform.opttwo;

selbox.options.length = 0;
if (chosen == " ") {
  selbox.options[selbox.options.length] = new Option('Please select one of the options above first',' ');

}
if (chosen == "1") {
  selbox.options[selbox.options.length] = new Option('first choice - option one','oneone');
  selbox.options[selbox.options.length] = new Option('first choice - option two','onetwo');
}
if (chosen == "2") {
  selbox.options[selbox.options.length] = new Option('second choice - option one','twoone');
  selbox.options[selbox.options.length] = new Option('second choice - option two','twotwo');
}
if (chosen == "3") {
  selbox.options[selbox.options.length] = new Option('third choice - option one','threeone');
  selbox.options[selbox.options.length] = new Option('third choice - option two','threetwo');
}
}
</script>

contra10 · January 21, 2009

by the way this code is in a php file...hense the <script> tags

contra10 · January 21, 2009

is it possible?

webster08 · January 21, 2009

if your first one worked; then do it the same way as you did the first one. just change your function's name and change your selbox variable to something like:

var selbox = document.myform.optthree;

Psycho · January 21, 2009

<html>
<head>

<script type="text/javascript">


// State lists
var states = new Array();

states['Canada'] = ['Alberta','British Columbia','Ontario'];
states['Mexico'] = ['Baja California','Chihuahua','Jalisco'];
states['United States'] = ['California','Florida','New York'];


// City lists
var cities = new Array();

cities['Canada'] = new Array();
cities['Canada']['Alberta']          = ['Edmonton','Calgary'];
cities['Canada']['British Columbia'] = ['Victoria','Vancouver'];
cities['Canada']['Ontario']          = ['Toronto','Hamilton'];

cities['Mexico'] = new Array();
cities['Mexico']['Baja California'] = ['Tijauna','Mexicali'];
cities['Mexico']['Chihuahua']       = ['Ciudad Juárez','Chihuahua'];
cities['Mexico']['Jalisco']         = ['Guadalajara','Chapala'];

cities['United States'] = new Array();
cities['United States']['California'] = ['Los Angeles','San Francisco'];
cities['United States']['Florida']    = ['Miami','Orlando'];
cities['United States']['New York']   = ['Buffalo','New York'];


function setStates(){

  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');

  stateList = states[cntrySel.value];

  changeSelect(stateSel, stateList);
  setCities();

}

function setCities(){

  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');
  citySel  = document.getElementById('city');

  cityList = cities[cntrySel.value][stateSel.value];

  changeSelect(citySel, cityList);

}

function changeSelect(fieldObj, valuesAry, optTextAry, selectedValue) {

  //Clear the select list
  fieldObj.options.length = 0;

  //Set the option text to the values if not passed
  optTextAry = (optTextAry)?optTextAry:valuesAry;

  //Itterate through the list and create the options
  for (var i=0; i<valuesAry.length; i++) {
    selectFlag = (selectedValue && selectedValue==valuesAry[i])?true:false;
    fieldObj.options[fieldObj.length] = new Option(optTextAry[i], valuesAry[i], false, selectFlag);
  }

}

</script>

</head>

<body onload="setStates();">
<form name="test" method="POST" action="processingpage.php">

Country: 
<select name="country" id="country" onchange="setStates();">
  <option value="Canada">Canada</option>
  <option value="Mexico">Mexico</option>
  <option value="United States">United States</option>
</select>
<br><br><br>

State: 
<select name="state" id="state" onchange="setCities();">
  <option value="">Please select a Country</option>
</select>
<br><br><br>

City: 
<select name="city"  id="city">
  <option value="">Please select a Country</option>
</select>
</form>

</body>
</html>

contra10 · January 21, 2009

ok that worked and i want to add an extra dropdown menu in

<script type="text/javascript">

// country lists
var country = new Array();

country['NorthAmerica'] = ['Canada'];
country['Europe'] = ['Swiss'];
country['Asia'] = ['China'];

// State lists
var states = new Array();

states['NorthAmerica'] = new Array();
states['NorthAmerica']['Canada'] = ['Alberta','British Columbia','Ontario'];

states['Europe'] = new Array();
states['Europe']['Swiss'] = ['Test'];


states['Asia'] = new Array();
states['Asia']['China'] = ['ChineseProvince1'];


// City lists
var cities = new Array();

cities['NorthAmerica'] = new Array();
cities['NorthAmerica']['Canada']['Alberta']          = ['Edmonton','Calgary'];
cities['NorthAmerica']['Canada']['British Columbia'] = ['Victoria','Vancouver'];
cities['NorthAmerica']['Canada']['Ontario']          = ['Toronto','Hamilton'];

cities['Europe'] = new Array();
cities['Europe']['Swiss']['Test'] = ['Zurich'];

cities['Asia'] = new Array();
cities['Asia']['China']['ChineseProvince1'] = ['Los Angeles','San Francisco'];


function setCountry(){

contSel = document.getElementById('continent');
  cntrySel = document.getElementById('country');

  stateList = states[cntrySel.value];

  changeSelect(stateSel, stateList);
  setCities();

}
function setStates(){

contSel = document.getElementById('continent');
  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');

  stateList = states[contSel.value][cntrySel.value];

  changeSelect(stateSel, stateList);
  setCities();

}

function setCities(){

	contSel = document.getElementById('continent');
  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');
  citySel  = document.getElementById('city');

  cityList = cities[contSel.value][cntrySel.value][stateSel.value];

  changeSelect(citySel, cityList);

}

function changeSelect(fieldObj, valuesAry, optTextAry, selectedValue) {

  //Clear the select list
  fieldObj.options.length = 0;

  //Set the option text to the values if not passed
  optTextAry = (optTextAry)?optTextAry:valuesAry;

  //Itterate through the list and create the options
  for (var i=0; i<valuesAry.length; i++) {
    selectFlag = (selectedValue && selectedValue==valuesAry[i])?true:false;
    fieldObj.options[fieldObj.length] = new Option(optTextAry[i], valuesAry[i], false, selectFlag);
  }

}

</script>

</head>

<body onload="setStates();">
<form name="test" method="POST" action="processingpage.php">

Continent: 
<select name="continent" id="continent" onchange="setCountry();">
  <option value="NorthAmerica">North America</option>
  <option value="Europe">Europe</option>
  <option value="Asia">Asia</option>
</select>
<br>

Country: 
<select name="country" id="country" onchange="setStates();">
  <option value="">Please select a country</option>
</select>
<br>

State: 
<select name="state" id="state" onchange="setCities();">
  <option value="">Please select a State/Province</option>
</select>
<br>

City: 
<select name="city"  id="city">
  <option value="">Please select a City</option>
</select>
</form>
?>

that doesn't seem to transfer any values

contra10 · January 21, 2009

i thhhink the problem is the set.values() cause my array seems ok...?

Psycho · January 21, 2009

There were several problems - the arrays and the code you modified. Here is the corrected code:

<script type="text/javascript">

// country lists
var country = new Array();
country['NorthAmerica'] = ['Canada'];
country['Europe'] = ['Swiss'];
country['Asia'] = ['China'];

// State lists
var states = new Array();

states['NorthAmerica'] = new Array();
states['NorthAmerica']['Canada'] = ['Alberta','British Columbia','Ontario'];

states['Europe'] = new Array();
states['Europe']['Swiss'] = ['Test'];


states['Asia'] = new Array();
states['Asia']['China'] = ['ChineseProvince1'];


// City lists
var cities = new Array();

cities['NorthAmerica'] = new Array();
cities['NorthAmerica']['Canada'] = new Array();
cities['NorthAmerica']['Canada']['Alberta']          = ['Edmonton','Calgary'];
cities['NorthAmerica']['Canada']['British Columbia'] = ['Victoria','Vancouver'];
cities['NorthAmerica']['Canada']['Ontario']          = ['Toronto','Hamilton'];

cities['Europe'] = new Array();
cities['Europe']['Swiss'] = new Array();
cities['Europe']['Swiss']['Test'] = ['Zurich'];

cities['Asia'] = new Array();
cities['Asia']['China'] = new Array();
cities['Asia']['China']['ChineseProvince1'] = ['Los Angeles','San Francisco'];


function setCountry()
{
  contSel = document.getElementById('continent');
  cntrySel = document.getElementById('country');

  countryList = country[contSel.value];

  changeSelect(cntrySel, countryList);
  setStates();
}

function setStates(){

  contSel  = document.getElementById('continent');
  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');

  stateList = states[contSel.value][cntrySel.value];

  changeSelect(stateSel, stateList);
  setCities();

}

function setCities(){

  contSel  = document.getElementById('continent');
  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');
  citySel  = document.getElementById('city');

  cityList = cities[contSel.value][cntrySel.value][stateSel.value];

  changeSelect(citySel, cityList);

}

function changeSelect(fieldObj, valuesAry, optTextAry, selectedValue) {

  //Clear the select list
  fieldObj.options.length = 0;

  //Set the option text to the values if not passed
  optTextAry = (optTextAry)?optTextAry:valuesAry;

  //Itterate through the list and create the options
  for (var i=0; i<valuesAry.length; i++) {
    selectFlag = (selectedValue && selectedValue==valuesAry[i])?true:false;
    fieldObj.options[fieldObj.length] = new Option(optTextAry[i], valuesAry[i], false, selectFlag);
  }
}

</script>

</head>

<body onload="setCountry();">
<form name="test" method="POST" action="processingpage.php">

Continent: 
<select name="continent" id="continent" onchange="setCountry();">
  <option value="NorthAmerica">North America</option>
  <option value="Europe">Europe</option>
  <option value="Asia">Asia</option>
</select>
<br>

Country: 
<select name="country" id="country" onchange="setStates();">
  <option value="">Please select a country</option>
</select>
<br>

State: 
<select name="state" id="state" onchange="setCities();">
  <option value="">Please select a State/Province</option>
</select>
<br>

City: 
<select name="city"  id="city">
  <option value="">Please select a City</option>
</select>
</form>

that doesn't seem to transfer any values

However, if you will have NO DUPLICATE VALUES (i.e. the ssame state name in two different countries) this is a more streamlined versions:

<script type="text/javascript">

// country lists
var country = new Array();
country['NorthAmerica'] = ['Canada','United States'];
country['Europe'] = ['Swiss'];
country['Asia'] = ['China'];

// State lists
var states = new Array();
//North America
states['Canada'] = ['Alberta','British Columbia','Ontario'];
states['United States'] = ['Florida','Oregon'];
//Europe
states['Swiss'] = ['Test'];
//Asia
states['China'] = ['ChineseProvince1'];


// City lists
var cities = new Array();
//North America
//--Canada
cities['Alberta']          = ['Edmonton','Calgary'];
cities['British Columbia'] = ['Victoria','Vancouver'];
cities['Ontario']          = ['Toronto','Hamilton'];
//--United States
cities['Florida']          = ['Orlando'];
cities['Oregon']           = ['Portland','Eugene'];
//Europe
//--Swiss
cities['Test'] = ['Zurich'];
//Asia
//--China
cities['ChineseProvince1'] = ['Los Angeles','San Francisco'];


function setCountry()
{
  contSel = document.getElementById('continent');
  cntrySel = document.getElementById('country');

  countryList = country[contSel.value];
  changeSelect(cntrySel, countryList);
  setStates();
}

function setStates()
{
  cntrySel = document.getElementById('country');
  stateSel = document.getElementById('state');

  stateList = states[cntrySel.value];
  changeSelect(stateSel, stateList);
  setCities();
}

function setCities()
{
  stateSel = document.getElementById('state');
  citySel  = document.getElementById('city');

  cityList = cities[stateSel.value];
  changeSelect(citySel, cityList);
}

function changeSelect(fieldObj, valuesAry, optTextAry, selectedValue) {

  //Clear the select list
  fieldObj.options.length = 0;

  //Set the option text to the values if not passed
  optTextAry = (optTextAry)?optTextAry:valuesAry;

  //Itterate through the list and create the options
  for (var i=0; i<valuesAry.length; i++) {
    selectFlag = (selectedValue && selectedValue==valuesAry[i])?true:false;
    fieldObj.options[fieldObj.length] = new Option(optTextAry[i], valuesAry[i], false, selectFlag);
  }
}

</script>

</head>

<body onload="setCountry();">
<form name="test" method="POST" action="processingpage.php">

Continent: 
<select name="continent" id="continent" onchange="setCountry();">
  <option value="NorthAmerica">North America</option>
  <option value="Europe">Europe</option>
  <option value="Asia">Asia</option>
</select>
<br>

Country: 
<select name="country" id="country" onchange="setStates();">
  <option value="">Please select a country</option>
</select>
<br>

State: 
<select name="state" id="state" onchange="setCities();">
  <option value="">Please select a State/Province</option>
</select>
<br>

City: 
<select name="city"  id="city">
  <option value="">Please select a City</option>
</select>
</form>

that doesn't seem to transfer any values

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[SOLVED] using a dropdown

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