[jQuery] jQuery toggle at first click

[yo2lux]

This is my jQuery code:

$(document).ready(function()
{
    $('.show_hide').click(function()
    {
             $(this).toggle(function()
             {
                 alert('1');
             },function() {
                 alert('2');
             });
    });
});

This code set an event listener on two DIV with class .show_hide. Now,
I click on first div and nothing happen. I click again and alert box 1
pop-up. This is strange , why statement run only at second click ?

Thanks!