function login_check() {
	
uname = document.getElementById("uname").value;
pass= document.getElementById("pass").value;

if (uname == "") {
hideAllErrors();
document.getElementById("unameError").style.display = "inline";
document.getElementById("uname").focus();
  return false;
  } 
  if (pass == "") {
hideAllErrors();
document.getElementById("passError").style.display = "inline";

document.getElementById("pass").focus();
  return false;
  } 
     }
function hideAllErrors() {

document.getElementById("unameError").style.display = "none";
document.getElementById("passError").style.display = "none";
document.getElementById("invalidError").style.display = "none";
}