function checkdata(){
  var mainForm = document.forms["PostForm"];
  var jUser = mainForm.txtUsername.value;
  var ipFileToTransfer = mainForm.txtFileToTransfer.value;
  var checked = true;
  if (jUser.length<3) {
    alert("Username has to be at least 3 characters long !");
    checked = false;
    }
  if (checked) {
      mainForm.method = "Post";
      mainForm.action = "../usercheck.php";
      mainForm.submit();
  } else {
      mainForm.method  = "Post";
      mainForm.action = "../Login.php?v_by_home=true&amp;ipFlag=1";
      mainForm.submit();
  }
  return checked;
}

function setfocus()
{
  var mainForm = document.forms["PostForm"];
  mainForm.txtUsername.focus();
}

function checkEnter(myform) {
  var mainForm = document.forms["PostForm"];
  if (window.event && window.event.keyCode == 13) {
        if (mainForm.txtUsername.value == "") {
                mainForm.txtUsername.focus();
        }
        else if (mainForm.txtPIN.value == "") {
                mainForm.txtPIN.focus();
        }
        else if (mainForm.txtPassword.value == "") {
                mainForm.txtPassword.focus();
        }
        else checkdata();

  }
  else
    return true;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}