what is BOM

1. the capability to pop up new browser windows
2. the capability to move, resize, and close browser windowns
3. the navigator object, which provides detailed information about the browser
4. the location object, which gives detailed information about the page loaded in the browser
5. the screen object, which gives detailed information about the user's screen resolution
6. support for cookies
7. custom objects such as XMLHttpRequest and IE's ActiveXObject

document.cookie: access all cookies in string.