page redirection script for old urls code example

Example 1: Which of the following is the correct way to redirect a user to a new page?

<meta http-equiv="refresh" content="0; URL='http://new-website.com'" />

Example 2: Which of the following is the correct way to redirect a user to a new page?

window.location = "http://new-website.com";
window.location.href = "http://new-website.com";
window.location.assign("http://new-website.com");
window.location.replace("http://new-website.com");