var call = onchange.match(/^\s?(.*?)\((.*?)\)\s?$/);
if (call) {
var method = call[1], args = [];
+ var argument_replacement = {
+ 'False' : false,
+ 'True' : true,
+ 'None' : null
+ }
_.each(call[2].split(','), function(a) {
var field = _.trim(a);
- if (self.fields[field]) {
+ if (field in argument_replacement) {
+ args.push(argument_replacement[field]);
+ } else if (self.fields[field]) {
var value = self.fields[field].value;
args.push(value == null ? false : value);
} else {