function getCensusTract(lat, lon) {
var url = 'xmlhttp-censustract.html?lat=' + lat + '&lon=' + lon + '&census_year=<%$census_year%>';
$.getJSON(url,function(data){
function getCensusTract(lat, lon) {
var url = 'xmlhttp-censustract.html?lat=' + lat + '&lon=' + lon + '&census_year=<%$census_year%>';
$.getJSON(url,function(data){