jenkins job description: button with javascript action not created by groovy - jenkins

Question

i used the code from the answer of ...
How to submit Jenkins job via REST API?
... to insert a button to the job build descriptions.
Jenkins version : 1.645
The button is visible, but the onClick action is simply not created.
Do i have to install additional jenkins plugins to allow javascript or ajax actions? Thanks for your support!
job.builds
.findAll { build -> build.number == buildNumber }
.each { build ->
build.setDescription("""
<button
type='button'
onclick='javascript:
console.log("OnClick Action triggered!");
var another_job = function() {
new Ajax.Request("http://jenkins.alalala/hudson/job/AA_dummy_job_AUTO/build", {
method: "post",
parameters: {json: Object.toJSON({parameter: [{name: "SOME_JOB_PARA", value: "MY_VALUE"}]})}
});
};
another_job();
location.reload();'>Do Something!</button>""")
}

Answer 1

Generally it seems like a bad idea to inject buttons into the UI, rather than using built-in features like downstream jobs, or the Promoted Builds Plugin, or the Parameterized Trigger plugin.
But you haven't given many details — do you see your log text being output in the JS console? Are there any other errors?
For what it's worth, it should work; Ajax.Request should be available on the job page by default, and pasting that JavaScript into the JS console in Chrome works for me — a new build is started with the parameter.

Answer 2

Thanks to Christopher,
since the 'anything goes'-Formatter plugin is not available for jenkins versions >1.5 i use an alternative.
Promoted Builds Plugin
Fits my needs in most cases.