ajax request with javascript prototype

How should I do to attach directl开发者_运维知识库y the params via post method with ajax.updater defined in prototype library?

The implicit method used by prototype is POST and you got two possibilities to submit post data. Either via the parameters option, or via the postBody parameter.

new Ajax.Updater('id_of_html_to_be_updated', 'url', {
  parameters: {
    id: 1,
    name: "string"
  }
});

// OR

new Ajax.Updater('id_of_html_to_be_updated', 'url', {
  postBody: 'id=1&name=string'
});

In the first version prototype converts the parameters option to a query string, while in the second example you explicitly state the query string in the postBody parameter.

You supply them via the parameters option:

new Ajax.Updater('targetId', '/your/url', {
    parameters: {
       foo: "fooValue",
       bar: "barValue"
    }
});

See the docs for details; docs for the various common Ajax options are here. The above updates the element with the ID "targetId" with the results of POSTing the parameters foo and bar to /your/url. Because I've supplied the parameters as an object, Prototype handles applying encodeURIComponent to them for me.