Access JSON data

[Samomack]

I am building a dynamic interface using Google Maps. My problem is that I can't access my JSON data dynamically.Here is my function:\[code\]function selectionField() { var asf = ""; for (i = 1; i < len + 1; i++) { if (document.getElementById('Car' + i).checked === true) { var a = 'Car' + i asf = asf + "<option valuehttp://stackoverflow.com/questions/15559046/= '" + jcarro.a.timestamp + "'> " + jcarro.a.timestamp + "</option>"; } } document.getElementById("asf").innerHTML = asf;}\[/code\]