For this Reddit thread: http://www.reddit.com/r/Favors/comments/1t6i0c/request_could_somebody_please_make_me_a_radius/ A bookmarklet that adds a text box to specify minutes for the ESRI Driving Distance mapper: http://resources.esri.com/help/9.3/arcgisserver/apis/javascript/gmaps/samples/geoprocessor/gp_servicearea.html

bookmarklet.js

javascript:(function(){GEvent.clearListeners(gmap,"click");document.getElementsByTagName('input')[0].insertAdjacentHTML('afterend','Drive Times:<input id="minutes"style="width:5em"type="text"value="5 15"/>(in minutes,separate multiple times with spaces)');GEvent.addListener(gmap,"click",function(marker,point){if(!marker){mapExtension.removeFromMap(gOverlays);var frslayer=new esri.arcgis.gmaps.FeatureSet();var feature=new esri.arcgis.gmaps.Feature();feature.geometry=point;frslayer.features=[feature];var drivetimes=document.getElementById('minutes').value;var params={"Input_Location":frslayer,"Drive_Times":drivetimes};driveTimeTask.execute(params,false,addResults);}});})()

ESRIStuff.js

(function(){
GEvent.clearListeners(gmap, "click");
document.getElementsByTagName('input')[0].insertAdjacentHTML('afterend','Drive Times: <input id="minutes" style="width:5em" type="text" value="5 15"/> (in minutes, separate multiple times with spaces)');
   
GEvent.addListener(gmap, "click", function(marker, point) {
    if(!marker){
      mapExtension.removeFromMap(gOverlays);
      var frslayer = new esri.arcgis.gmaps.FeatureSet();
      var feature = new esri.arcgis.gmaps.Feature();
      feature.geometry = point;

      frslayer.features = [ feature ];
      var drivetimes = document.getElementById('minutes').value;
      var params = { "Input_Location": frslayer, "Drive_Times": drivetimes };
      driveTimeTask.execute(params,false, addResults);
    }
  });
  
})()