my question is how push menus from bottom to up are displayed. this is example site http://www.askaspension.gr/ i have no idea about that code. please help me. i want same as it as code in that web site

chances are pretty good it's a jquery plugin.
by taking a look at the source code of that page, these might be a good place to start your research on:

<link rel="stylesheet" type="text/css" href="ddsmoothmenu.css" />

<script type="text/javascript" src="js/jquery-1.6.4.min.js"></script>
<script type="text/javascript" src="js/jquery.mousewheel.js"></script>
<script type="text/javascript" src="js/jquery.jscrollpane.min.js"></script>

<script type="text/javascript" src="ddsmoothmenu.js"></script>
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