any one help me how to pass a value from one html page to another page using javascript??

Answer 1

For not sensible values, you can do it in JS with help of cookies or better html5 local storage...
https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie
https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage

Answer 2

use php get or session variables. Avoid doing lt with js for security reasons (xss cross site scripting vulnerability)