<script language="JavaScript">
<!--
function namosw_infotext()
{
  var username;
  var type, i, top, obj;
  for (i = 1, top = 0; i < namosw_infotext.arguments.length; i += 2) {
    obj = eval('document.'+namosw_infotext.arguments[i]);
    if (obj == null) continue;
    type = namosw_infotext.arguments[i+1];
    if (type == 'username') {
      if (username == null)
        username = prompt(namosw_infotext.arguments[0], "");
      username = (username == null) ? '' : username;
      obj.value = username;
    } else if (type == 'moddate') {
      obj.value = document.lastModified;
    } else if (type == 'ipaddr' || type == 'hostname') {
      if (navigator.appName == 'Netscape') {
        var host  = java.net.InetAddress.getLocalHost();
        obj.value = (type == 'ipaddr') ? host.getHostAddress() : host.getHostName();
      } else {
        obj.value = '';
      }
    }
  }
}

//-->
</script>

</head>

DESPUES, DONDE LO QUIERAS...

<form name="form1" method="get">
<p align="left">&nbsp;<input type="text" name="infotext1" value="User Name" size="30"
 style="text-decoration:none;"></p>
</form>