function datacheck() {
  frm=document.forms["iden"];
  if (frm.usnm.value=="") {
    alert("Please enter an Username!");
    frm.usnm.focus();
    return false;
  }
  else {
    if (frm.pass.value=="") {
      alert("Please enter an password!");
      frm.pass.focus();
      return false;
    }
  }
}