finally I get my Up and Down effect solved with these lines, but I noticed that I have to click the clickable the area twice on the first load, would anyone here tell me why ?

here's the code

2. $(document).ready(function() {
3.     $("#slideHeader").click( function() {
4.        if ($("#openCloseIdentifier").is(":hidden")) {
5.      $(".boxgrid").animate({ 
6.        marginBottom: "-100px"
7.      }, {duration: 'slow', easing: 'easeInOutCubic'} );
8.      $('#myToggle').css('background-position', '0 0');
9.      $("#openCloseIdentifier").show();
10.      } else {
11.     $(".boxgrid").animate({ 
12.       marginBottom: "0px"
13.      }, {duration: 'slow', easing: 'easeInOutCubic'} );
14.    $('#myToggle').css('background-position', '0 -20px');
15.    $("#openCloseIdentifier").hide();
16.   }
17. });  
18. });

thanks