Any body knows how to create plug-in?

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jQuery

Hi...I wrote one java script file and i want to create a plug in for that...but i dont know how to create plug in...
Any body please hel me...
Here i share my javascript ad plugin format...

Javascript

$(document).ready(function () {
$("ul li").click(function () {

//$("ul li").not($(this)).removeClass("active");
//$(this).addClass("active");
var ind = $(this).index();
$("#panel div").not($(this)).hide(); //panel is the id of my main div
$("#panel div:eq(" + ind + ")").show();
});
});

Plugin format




(function ($) {
$.fn.tabfunction = function () {
$("ul li").click(function () {
var ind = $(this).index();
$("#panel div").not($(this)).hide();
$("#panel div:eq(" + ind + ")").show();
});
}
}(jquery));



thanks in advance....