<script type="text/javascript">  
  function slide(obj, direction, a) {  
  clearInterval(window.z);  
  counter = 0;  
  z = setInterval(function () {  
  if (a ? parseInt(obj.style.marginTop) < 0 : parseInt(obj.style.marginTop) > -300) {  
  obj.style.marginTop = parseInt(obj.style.marginTop) + direction;  
  counter++;  
  } else {  
  clearInterval(z);  
  }  
  },  
  10);  
  }  
  var pad = document.getElementById('x');  
  pad.onmouseover = function () {  
  slide(this, 3, true);  
  }  
  pad.onmouseout = function () {  
  slide(this, -3, false);  
  }  
  </script>

<div id="x" style="width: 100%; height: 300px; border-bottom: 5px dashed #eee; background: #555; position: absolute; margin-top: -300px;">  
  <span style="color: white; font-weight: bold;">  
  Slide Panel by $USERNAME$  
  <br />  
  Кстати, на чистом JS, без jQuery <img rel="usm" src="http://megasoft.3dn.ru/emoticons/Sypsena.gif" border="0" align="absmiddle" alt=":)">  
  <br />  
  Хотя кого это волнует.  
  </span>  
  </div>

<div id="x" style="width: 300px; height: 50%; border-right: 5px dashed #eee; background: #555; position: absolute; margin-left: -300px; margin-top: 100px;">  
  <span style="color: white; font-weight: bold;">  
  Slide Panel by $USERNAME$  
  <br />  
  Кстати, на чистом JS, без jQuery <img rel="usm" src="http://megasoft.3dn.ru/emoticons/Sypsena.gif" border="0" align="absmiddle" alt=":)">  
  <br />  
  Хотя кого это волнует.  
  </span>  
  </div>

<script type="text/javascript">  
  function slide(obj, direction, a) {  
  clearInterval(window.z);  
  counter = 0;  
  z = setInterval(function () {  
  if (a ? parseInt(obj.style.marginLeft) < 0 : parseInt(obj.style.marginLeft) > -300) {  
  obj.style.marginLeft = parseInt(obj.style.marginLeft) + direction;  
  counter++;  
  } else {  
  clearInterval(z);  
  }  
  },  
  10);  
  }  
  var pad = document.getElementById('x');  
  pad.onmouseover = function () {  
  slide(this, 3, true);  
  }  
  pad.onmouseout = function () {  
  slide(this, -3, false);  
  }  
  </script>