function call_api(fn, callback, vars) {
    var s = document.createElement('script');
    var url = 'http://www.theyworkforyou.com/api/'
        + fn + '?key=Fqxv3SFxfcfqBtX7dFFmZLSN&callback=' + callback;
    for (var i in vars) {
        url += '&' + i + '=' + encodeURIComponent(vars[i]);
    }
    s.setAttribute('src', url);
    s.setAttribute('type', 'text/javascript');
    document.getElementsByTagName('head')[0].appendChild(s);
}

function lookup(pc) {
    call_api('getConstituency', 'const_received', { postcode: pc } );
}

function const_received(r) {
    if (r.error) {
		document.getElementById('theyworkforyou_error').innerHTML = r.error;
        return;
    }
    window.location = 'search.php?constituency_name='+escape(r.name);
}