geo-convert.js

function convert(geo){
	var latlonrg = /(\d+(?:\.\d+)?)[\xb0\s]?\s*(?:(\d+(?:\.\d+)?)['\u2019\u2032\s])?\s*(?:(\d+(?:\.\d+)?)["\u201d\u2033\s])?\s*([SNEW])?/i;

	var m = String(geo).split(latlonrg),
    lat = m && +m[1] + (m[2] || 0) / 60 + (m[3] || 0) / 3600;
    
    if (m[4].toUpperCase() == "S") {
    	lat = -lat;
    }
    
    var lon = m && +m[6] + (m[7] || 0) / 60 + (m[8] || 0) / 3600;
    
    if (m[9].toUpperCase() == "W") {
    	lon = -lon;
    }
    return lat+','+lon;
}