Dynamic Country State Javascript Menu Example

Knix — Sat, 09 Feb 2008 07:36:02 +0000

I have found myself in a couple of situations where I needed a simple dynamic javascript menu where the user would make a selection from one select list and depending on what the user selected from the first select list a second list would offer further options. Here is a perfect example:

Demo

Country:

State/Province:

Country value:
State/Province value:

In this example, the state/province menu is disabled until the user has first selected a country. Then depending on the country that is chosen, the list of associated states or provinces would follow. For the sake of simplicity, only the state/province menus have been implemented for the United States and Canada. If any other country is chosen, the value for the state input defaults to Other.

Here is the HTML code for the example:

Country:

State/Province:

Country value:
State value:

After the user makes a country selection, the Javascript onChange event is fired and executes the printStateMenu Javascript function and passes the value of the country that was chosen as an argument. The table just displays the current values of the country and state select inputs. Please note that the script source path on line 1 will have to edited depending on where you store the JavaScript function. Here is the Javascript code for the printStateMenu function:

function printStateMenu(country) {     
	var stateSelect = '';
	if (country == 'US') {
		stateSelect = '';
	}
	else if (country == 'CA') {
		stateSelect = '';
	}
	else {
		stateSelect = '';
	}
	document.getElementById('stateSelect').innerHTML = stateSelect;
	document.getElementById('countryValue').innerHTML = document.getElementById('country').value;
	document.getElementById('stateValue').innerHTML = document.getElementById('state').value;
}

This Javascript function is pretty simple. It looks at the country value that was selected and creates the corresponding state/province menu. Then it replaces the HTML code in the stateSelect DOM element with the new select menu. The state/province select inputs for US and Canada also have an onChange event that displays the chosen value of the state input into the table. The select menu for any other country will just return a disabled select menu and default to the Other value for the state input.

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Dynamic Country State Javascript Menu Example