Question

I’ve this

<li class="sub_nivel nivel_3"> level 3 </li>

I need to on li over know the number of this “nivel_” in this case 3 so I can manipulate the previous nivel_2 z-index property.

How can I do this ?

Thanks

Answer 1

You can grab the current number from the class value:

$("li.sub_nivel").on("click", function(){
    var nivel = $(this).attr("class").match(/nivel_([\d]+)/),
        antes = parseInt(nivel[1],10)-1 ;
    alert( antes );
});​

Fiddle: http://jsfiddle.net/tHXyq/2/