Is there URLEncode function in Javascript ?

<script type="text/javascript"><!--

  function MoveTab(txtObj, event)
  {
    var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
    if (keyCode == 13) do_search();
  }

  function do_search()
  {
    if (document.getElementById("keyword").value)
    {
      self.location = "http://reportbank.com/s_" + EncodeURI(document.getElementById("keyword").value);
    }
  }
-->
</script>
<div width="100%" align=center>
  <font size=+6><strong>ReportBank</strong></font><br>
  <br>
    <input type=text id=keyword name=keyword size=20 value="<?=$keyword?>" onkeypress="return MoveTab(this, event)">
    <input type=button value=" Search " onclick="javascript:do_search()">
  <br>
</div>