How to show menu based on user

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HTML

form id=form_id method=post name=myform
Login Form

div
input type=text placeholder=UserName id=username
div

div
input type=password placeholder=Password id=password
div

button type="button" class=btn btn-success> Login button

script type="text/javascript"
function validate()
{
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
if ( username == "user" && password == "pass")
{
window.location="TravelRequest.html";
}
}


i am showing the menu based on username and password, if username is user and password is pass,

Then in browser shows the menu name as TravelRequest.html

in browser i have menu as follow


Employee
Profile (when user clicks the profile it will go to profile.html)
Registration (when user clicks the Registration it will go to Registration.html)

TravelRequest (when user clicks the TravelRequest it will go to TravelRequest.html)

when user types the user and pass in username and password i want to display the profile and Registration menus

for that how to do. i am writing a code in html page.

What I have tried:

form id=form_id method=post name=myform
Login Form

div
input type=text placeholder=UserName id=username
div

div
input type=password placeholder=Password id=password
div

button type="button" class=btn btn-success> Login button

script type="text/javascript"
function validate()
{
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
if ( username == "user" && password == "pass")
{
window.location="TravelRequest.html";
}
}


i am showing the menu based on username and password, if username is user and password is pass,

Then in browser shows the menu name as TravelRequest.html

in browser i have menu as follow


Employee
Profile (when user clicks the profile it will go to profile.html)
Registration (when user clicks the Registration it will go to Registration.html)

TravelRequest (when user clicks the TravelRequest it will go to TravelRequest.html)

when user types the user and pass in username and password i want to display the profile and Registration menus

for that how to do. i am writing a code in html page.