13. A non-transitory computer-readable storage medium comprising computer program instructions that, when executed on at least one processor in a computer, perform a method of synchronizing visual and speech events in a multimodal application, the method comprising: calling a voice form of the multimodal application, wherein the multimodal application provides a multimodal web page to a client device over a network; receiving speech from a user; determining a semantic interpretation of the speech; calling a global application update handler of the multimodal application including exiting a voice form; identifying, by the global application update handler, an additional processing function in dependence upon the semantic interpretation; executing the additional processing function; updating a visual element after executing the additional processing function; updating a voice form after executing the additional processing function; and restarting the voice form after executing the additional processing function, wherein determining a semantic interpretation of the speech comprises determining a plurality of semantic interpretations of the speech, and wherein identifying, by the global application update handler, an additional processing function in dependence upon the semantic interpretation comprises identifying, by the global application update handler, an additional processing function for each of the plurality of semantic interpretations.
13. A non-transitory computer-readable storage medium comprising computer program instructions that, when executed on at least one processor in a computer, perform a method of synchronizing visual and speech events in a multimodal application, the method comprising: calling a voice form of the multimodal application, wherein the multimodal application provides a multimodal web page to a client device over a network; receiving speech from a user; determining a semantic interpretation of the speech; calling a global application update handler of the multimodal application including exiting a voice form; identifying, by the global application update handler, an additional processing function in dependence upon the semantic interpretation; executing the additional processing function; updating a visual element after executing the additional processing function; updating a voice form after executing the additional processing function; and restarting the voice form after executing the additional processing function, wherein determining a semantic interpretation of the speech comprises determining a plurality of semantic interpretations of the speech, and wherein identifying, by the global application update handler, an additional processing function in dependence upon the semantic interpretation comprises identifying, by the global application update handler, an additional processing function for each of the plurality of semantic interpretations. 15. The non-transitory computer-readable storage medium of claim 13 , wherein calling the global update handler comprises calling the global update handler independently of any particular voice form.