How do I convert text to hash using javascript

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Javascript

website

I am trying to make a webite for a school project and i need to convert text to hash using javascript.

i make the login but without a hash gen i can't use it.
truth is i ant good with websites but i am good with C# thats why the javascript
is formated like C# lol. I just need a function that i can pass the string to.
can you help

thanks

What I have tried:

function Login()
		{
			var Pass = document.getElementById("Password").value;
			var User = document.getElementById("Username").value;
			var Key = "8C6976E5B5410415BDE908BD4DEE15DFB167A9C873FC4BB8A81F6F2AB448A918" // using SHA256 the passwords "admin"
			var Username = "8C6976E5B5410415BDE908BD4DEE15DFB167A9C873FC4BB8A81F6F2AB448A918" // usernames admin as well
			if (Pass == Key & User == Username) 
			{
				window.open("/access.html")
			}
			else
			{
				alert("Thats not the right username or password");
			}
		}