gistfile1.js

var coordsToAngle = function(c){
	if(typeof c == Array && c.length==3)
		var deg = c[0], min = c[1], sec = c[2];
	else {
		var deg = c.match(/([\-]?[\d]{1,3})\°/), deg = (deg === null ? 0 : deg[1].toInt());
		var min = c.match(/([\-]?[\d]{1,3})\'{1}/), min = (min === null ? 0 : min[1].toInt());
		var sec = c.match(/([\-]?[\d]{1,3})\'{2}/), sec = (sec === null ? 0 : sec[1].toInt());
	}
	c = deg + min/60 + sec/3600;
	return c;
}

var degToRadians = function(angle){
	var angle = angle*Math.PI/180;
	return angle;
}

var placePointOnMap = function(lon,lat,map_width,map_height){
	if(arguments.length==2) var map_width = 1, map_height = 1;

	function MillerCylindricalProjection(phi){
		phi = (5/4)*Math.log(Math.tan((0.25*Math.PI+0.4*phi)))
		return phi
	}

	var lon = degToRadians(coordsToAngle(lon)),
		lat = degToRadians(coordsToAngle(lat)),
		max_x = Math.PI;
		max_y = MillerCylindricalProjection(-Math.PI/2),
		pos = new Object;

	pos.x = (lon+max_x)/(2*max_x)*map_width;
	pos.y = (MillerCylindricalProjection(lat)+max_y)/(2*max_y)*map_height;
	
	return pos;
}