Question: I have a function that shows a menu when clicking on it, and I want it to disappear after 5 seconds. This is my javascript - it works properly on desktop browser but it doesn't disappear on the mobile ones.

```
$(function() {
    $('#prod_btn').click(function() {
        $(this).addClass('selected').next('ul').css('display', 'block');
        setTimeout(hideMenu, 5000);
    });
});

function hideMenu() {
    $('#prod_btn').removeClass('selected').next('ul').css('display', 'none');
}

```

Where is the problem?

Thanks

Answer: 
I moved your example to a jsbin, and it's working on my iphone 4.

Please test it out going here from your devices: <http://jsbin.com/asihac/5>

You can see the code here <http://jsbin.com/asihac/5/edit>

The example is using jQuery - latest and I only added the required css class.
Keep in mind also that any setTimeout function is actually likely fire while DOM elements are rendering if the delay is set to a value too short. While that might seem obvious, it can be easily confused with no method firing whatsoever. A good way to test is to have an alert prompt run.

```
window.onLoad(alert("hey!"));

```

Then check to see if your function fires after.