CSS not working on DDL when Click Disabled or Enabeled Button

haha world :D i just using button1.Enabled=true;

(document).ready(function(){


// The select element to be replaced:
$('select.DropDownSlide').each(function(i){
var select = $(this);

var selectBoxContainer = $('<div>', {
width : select.outerWidth(),
className : 'tzSelect',
html : '<div class="selectBox"></div>'
});

var dropDown = $('<ul>',{className:'dropDown'});
var selectBox = selectBoxContainer.find('.selectBox');

// Looping though the options of the original select element

select.find('option').each(function(i){
var option = $(this);
if(i == select.attr('selectedIndex')){ selectBox.html(option.text()); }
if(option.data('skip')){ return true; }
var li = $('<li>',{ html: option.text() });


li.click(function(){
$('li').removeClass('dropSelected');
$(this).addClass('dropSelected');
selectBox.html(option.text());
dropDown.trigger('hide');
select.val(option.val());
return false;
});
dropDown.append(li);
$('li:first').addClass('selected');
});

selectBoxContainer.append(dropDown.hide());
select.hide().after(selectBoxContainer);

// Binding custom show and hide events on the dropDown:

dropDown.bind('show',function(){
if(dropDown.is(':animated')){
return false;
}

selectBox.addClass('expanded');
dropDown.slideDown();

}).bind('hide',function(){
if(dropDown.is(':animated')){
return false;
}

selectBox.removeClass('expanded');
dropDown.slideUp();

}).bind('toggle',function(){
if(selectBox.hasClass('expanded')){
dropDown.trigger('hide');
}
else dropDown.trigger('show');
});

selectBox.click(function(){
dropDown.trigger('toggle');
return false;
});

$(document).click(function(){
dropDown.trigger('hide');
});
});
});