So, I have this simple code

$('#info_name'+index).show("slide", {direction: "right"}, 1000, function(){
    $('#info_info'+index).show('slide',{direction: "up"}, 1000);
});

The i is declared upper as just a variable var i=0, but in callback, function I can't see it...

• javascript
• jquery
• jquery-ui
• jquery-callback

There is a scope issue with i. Since i is declared in the outer scope, all callbacks will reference the same i, meaning, if i is changed, all callbacks' references to i will also be changed.

What you can do is to create a function to generate the callback, since a new scope is created in that case, the value of i will be preserved.

Based on the original question, I simplified the code a little bit. You've since edited it, and I can't find the callback anymore... but hope this might help ya

var getCallback = function(index) {
    return function(){
        // You can see how this index is being captured correctly in Javascript console
        console.log(index);
        $('#name' + index).show('slide',{direction: "up"}, 1000)
    };
};

for (var i = 0; i < 3; ++i) {
    $('#name'+i).show("slide", {direction: "right"}, 1000, getCallback(i));
}

JSFiddle: http://jsfiddle.net/vd9Mj/​

UPDATE:

Where's your callback...? It seems you've removed it from the question.

var i=-1;

var doStuff = function(index) {
    $('.third').append('<div class="showinfo"><h3 id="info_name'+i+'" class="info_name">'+contact_name[index]+'</h3><span class="info_info" id="info_info'+index+'"><strong>'+contact_information[0][0]+'</strong>: '+contact_number[index]+'</span></div>');
    $('#info_name'+index).show("slide", {direction: "right"}, 1000);
    $('#info_info'+index).delay(1000).show('slide',{direction: "up"}, 1000, function() {
       // Insert code for callback.
    });
};

$.each(contact_status, function(key, value){
    i++;
    if(value == info_id){
        doStuff(i);
    }
});
​

I'm not sure this will do what you want, even if i was available - if you want your callback function to affect the element the event handler is attached to, use $(this):

$('#info_name'+i).show("slide", {direction: "right"}, 1000, function(){
        $(this).show('slide',{direction: "up"}, 1000)
});