In JQuery you could do this on document ready

$.getScript("somescript.js", function(){

alert("Script loaded and executed.");

});

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It is possible. I was doing a similar thing in an AJAX intensive site, but I was loading the Google Charts API. Here is the code I used to load the Google Charts API when a button was clicked on the page.

function loadGoogleChartsAPI() {

var script = document.createElement("script");

// This script has a callback function that will run when the script has

// finished loading.

script.src = "http://www.google.com/jsapi?callback=loadGraphs";

script.type = "text/javascript";

document.getElementsByTagName("head")[0].appendChild(script);

}

function loadGraphs() {

// Add callback function here.

}

This uses a callback function that will run when the script has loaded.

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No one mentioned these?

$(window).load(function(){

// do something

});

or

$(window).bind("load", function() {

// do something

});