Recently I worked on a mobile website. For this website it was very important to determine the geolocation of a visitor.

After some research I created a simple javascript that allows you to get the latitude and longitude of a visitor.

geolocation.js [download]

/**
 * Package: Geolocation
 * Version: 1.0
 * Author: Jeroen Weustink (http://www.jeroenweustink.nl/)
 */

geolocation = {

	lat	: false,
	lng	: false,

	/**
	 * Get location of visitor
	 */
	get : function()
	{	

		// Check if navigator.geolocation is available
		if(navigator.geolocation){

			// Get position
			navigator.geolocation.getCurrentPosition(function(position){

				// Set lat & lng
				geolocation.lat = position.coords.latitude;
				geolocation.lng = position.coords.longitude;

				// Callback
				geolocation.set();

			});

		} else {

			// No navigator.geolocation support
			alert('No geolocation support');

	    }
	},

	/**
	 * Callback function when location is available
	 */
	set : function()
	{
		alert(geolocation.lat+'/'+geolocation.lng);
	}
}

All you need to do is run geolocation.get().

You are free to change the script.

Enjoy…