loading js files dynamically via another js file?

is there anyway to load other JS files from within a single JS file. I would like to point my individual pages "ITS" js file and that js file would load jquery, other js files.

I know i can just pop all these into the html i.e.

I was thinking of开发者_运维问答 separations of concerns so i was wondering if anything exists already without me reinventing the wheel....

That i would just need to edit home.js to change what other js (jquery etc) are loaded for home.htm ... home.htm would just point to home.js

Thanks

You can take a look at dynamic script loading. Here's an excerpt from the article:

var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'helper.js';
head.appendChild(script);

For external domain JS link

var loadJs = function(jsPath) { 
    var s = document.createElement('script');
    s.setAttribute('type', 'text/javascript');
    s.setAttribute('src', jsPath);
    document.getElementsByTagName('head')[0].appendChild(s);
};
loadJs('http://other.com/other.js'); 

For same domain JS link (Using jQuery)

var getScript = function(jsPath, callback) {
    $.ajax({
        dataType:'script',
        async:false,
        cache:true,
        url:jsPath,
        success:function(response) {
            if (callback && typeof callback == 'function') callback();
        }
    });
};
getScript('js/other.js', function() { functionFromOther(); }); 

This is similar to Darin's solution, except it doesn't make any variables.

document.getElementsByTagName('head')[0].appendChild(document.createElement("script")).src = "helper.js";

I'd suggest you take a look at labJS. It's a library made specifically to load Javascript. As they say..."The core purpose of LABjs is to be an all-purpose, on-demand JavaScript loader, capable of loading any JavaScript resource, from any location, into any page, at any time."

See the labJS home page for more information.

Google offers centrally hosted versions of the major javascript libraries like jQuery. They can be dynamically loaded using the google loader.

http://code.google.com/apis/ajaxlibs/documentation/