Our functional reactive web framework is specific for the R language but supports what you're describing (if I understand you correctly). http://rstudio.github

Our functional reactive web framework is specific for the R language but supports what you're describing (if I understand you correctly). http://rstudio.github.com/shiny/tutorial/#dynamic-ui http://rstudio.github.com/shiny/tutorial/#dynamic-ui (scroll down to reactiveUI) An example: http://glimmer.rstudio.com/winston/dynamic_ui/ http://glimmer.rstudio.com/winston/dynamic_ui/ https://gist.github.com/4211337 https://gist.github.com/4211337