Attach a function to a page from a content script and execute it with arguments.

Attach function with arguments.js

function exec(fn) {
	var args = '';
	if (arguments.length > 1) {
		for (var i = 1, end = arguments.length - 2; i <= end; i++) {
			args += typeof arguments[i]=='function' ? arguments[i] : JSON.stringify(arguments[i]) + ', ';
		}
		args += typeof arguments[i]=='function' ? arguments[arguments.length - 1] : JSON.stringify(arguments[arguments.length - 1]);
	}
	var script = document.createElement('script');
	script.setAttribute("type", "application/javascript");
	script.textContent = '(' + fn + ')(' + args + ');';
	document.documentElement.appendChild(script); // run the script
	document.documentElement.removeChild(script); // clean up
}

script = function(what, huh, nah, yeah) {
	console.debug(arguments);
	console.debug('what=', what);
	console.debug('huh=', huh);
	console.debug('nah=', nah);
	console.debug('yeah=', yeah);
	if (typeof yeah=='function') yeah();
}

exec(script, 'meh', ['bleh'], {
	a: {
		b: 0
	}
}, function(){
	alert('hi');
});

console.debug('No arguments');

exec(script);