function in_array(needle, haystack) {
	for (var i=0, j=haystack.length; i < j; i++) {
		if (needle == haystack[i]) return true;
	}
	return false;
}

function in_array(needle, haystack) {
	for (var i=0, var j=haystack.length; i < j; i++) {
		if (needle == haystack[i]) return true;
	}
	return false;
}

function in_array(needle, haystack) {
	for (var i=0; i < haystack.length; i++) {
		if (needle == haystack[i]) return true;
	}
	return false;
}

Quick and easy javascript in_array function. It's not perfect, but if you need something quick, this is it.

javascript in_array

javascript, array

JavaScript