Roman-lev,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<style type="text/css">
.sec {
display: none;
height: 100px;
background-color: #9932CC;
}
p {
background-color: #00FF7F;
}
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script>
$(function () {
$('#fir').hover(function () {
$('div.sec').stop().slideToggle('slow');
});
});
</script>
</head>
<body>
<p id="fir">1234567</p>
<div class="sec">1234567</div>
</body>
</html>