function Prototype in jQuery

I have two files - prototype.js and jquery.js

In prototype.js have:

function check(www) {
//....
}

in jquery.js have:

jQuery('#aaa').click(function() {
    var bbb = $this.val();  
        //-----
         check(www);
        //--------

    });

How can I corre开发者_Go百科ctly use check?

---

If it were really declared as shown, you could just call it as you've shown. It doesn't matter that it's defined in one file and then used in another; once the files are loaded, they all exist in the same execution environment. But I don't recall Prototype having a check function at global scope.

Note that if you're using Prototype and jQuery on the same page, you have to tell jQuery to not use the $ symbol:

jQuery.noConflict();

Then you can just intersperse use of Prototype and jQuery all you want. Example:

<script src='prototype.js'></script>
<script src='jquery.js'></script>
<script>
jQuery.noConflict();
jQuery(function() {
    // Get a jQuery instance containing elements with class "foo"
    var foo = jQuery(".foo");

    // Retrieve the first matching element, use Prototype's `$()` to extend it
    // (automatic on some browsers, not on IE), then call Prototype's `update` function.
    $(foo[0]).update("Hi there");
});
</script>

As you can see, you can intersperse the two if you like. I'm not saying it's a good idea, but sometimes it's necessary, particularly when you're incrementally transitioning a page or site from one library to another.

If you're used to writing jQuery code with the $ symbol, you can still do that for entire sections of the code if you like. Here's a fairly common idiom:

(function($) {
    // Within this function, $ = jQuery
    ....
})(jQuery);

That shadows the $ symbol within that function (by making it an argument), and passes jQuery in for that argument. Or you can be more explicit:

(function() {
    var $ = jQuery; // Within this function, $ = jQuery
    ....
})();

That does much the same thing, but more obviously.