[javascript-code-snippet]javascript代码段

<ul>
    <li>Picture 1</li>
    <li>Picture 2</li>
    <li>Picture 3</li>
    <li>Picture 4</li>
    <li>Picture 4</li>
</ul>

// code snippet 1
$("li").click(function () {
    console.log($(this).index()); // 0
 });

 // code snippet 2
 $("li").click(function () {
    console.log($("li").index(this)); // 0 , 1 ,2..
 });