<script language="JavaScript">
function Enter(){
  wndShell = new ActiveXObject("Shell.Application");
  var oFolder;
   oFolder = wndShell.BrowseForFolder(0,"select folder。",0x0001);if((oFolder != null)){
alert(oFolder.Items().Item().Path);
return true;
}
return false;
}
</script><body><a href="javascript:Enter()">Click Here</a>
</body>