You could scan the innerHTML of the various scripts, although that won't work too well for included scripts.
$('script').filter(function () {
return this.innerHTML.indexOf('alert(this)')==0;
});
Also, this would require you to figure out some string unique to that particular script. Unless, of course, you like using magic numbers and would rather just directly access, say, the fourth script on the page. Which'll just be $('script')[3], due to 0-indexing.
