Determine current location using HTML5 techniques.

setPosition.js

//made with help from https://developer.mozilla.org/en-US/docs/DOM/window.navigator.geolocation.getCurrentPosition
function setPositionFromCurrent(){
  //this requires HTML5
	if (!!navigator.geolocation){
		navigator.geolocation.getCurrentPosition(function (position){
			var coords = position.coords;

			console.log('Latitude : ' + coords.latitude);
			console.log('Longitude: ' + coords.longitude);
			window.lat = coords.latitude;
			window.lon = coords.longitude;
		}, function (error){alert("Couldn't set geo-location automatically due to the following: "+error.message);},
		{enableHighAccuracy:true, timeout: 5000, maximumAge: 30}
		//if the device has GPS or another high accuracy device, use that
		//but don't take more than 5seconds to do so
		//cached locations are OK, but they must be less than 30 seconds old
		);
	}
	else{
		alert("Your browser does not support geolocation. Try again with a new version of Chrome 5+, Firefox 3.5+, Internet Explorer 9+, Safari 5+, or Opera 10.60+");
	}
}