JavaScript injected through Chrome extension is not loaded

Question

I am trying to inject a JavaScript through a Chrome extension, but the script onload method is not called...

var scriptURL = 'http://'+response.scriptUrl,
    scriptTag = document.createElement('script');

scriptTag.type = 'text/javascript';
scriptTag.src = scriptURL;

function onload()
{
    alert('onload');
};
        
scriptTag.onload = onload;
$('head').append(scriptTag);

Any ideas why the alert isn't raised?

Answer 1

Please try this:

var scriptURL = 'http://'+response.scriptUrl,
    scriptTag = document.createElement('script');

scriptTag.type = 'text/javascript';
scriptTag.src = scriptURL;

function onload()
{
    alert('onload');
};

scriptTag.onload = onload;
var head = document.getElementsByTagName('head')[0];
head.appendChild(scriptTag);