JavaScript DOM API
document object
attributes of document object
document.title //设置文档标题等价于HTML的<title>标签
document.URL //设置URL属性从而在同一窗口打开另一网页
document.fileCreatedDate //文件建立日期，只读属性
document.fileModifiedDate //文件修改日期，只读属性
document.fileSize //文件大小，只读属性
document.cookie //设置和读出cookie
document.charset //设置字符集 简体中文:gb2312
document.body // body 元素
document.location.hash/host/href/port // location
methods of document object
getElementById() // 返回一个 Element
getElementsByName() // 根据 name 属性获得元素, 返回一个 NodeList
getElementsByTagName() // 返回一个 HTMLCollection/NodeList(Webkit)
getElementsByClassName() // 返回一个 HTMLCollection
querySelector() // 返回一个符合的元素, 性能很差
querySelectorAll() // 返回所有符合的元素组成的 NodeList, 性能很差
document.write()
document.createElement()
window object
functions in window object
setTimeout(func, milliseconds, parameters...)
setInterval(func, milliseconds, parameters...)
NOTE: javascript is asynchonous, even if you set 0 timeout, the function is just put into the execute queue, not invoked immediately.
window.location
location setting location will cause the page to redirect to new page
location.href
location.protocol
location.host
location.hostname
location.port
location.pathname
location.search
location.hash
location.assign() go to a new address
location.replace() go to a new address and do not disturb the history
location.reload() reload the page
window.history
history.back()
history.forward()
history.go(number)
window.screen
window.screen.width screen width, not the viewport width window.screen.height screen height
alert, confirm and prompt
alert show a message confirm return a bool by user action prompt
Same Origin Policy
document.domain is the key to decide the origin of a script.
scripts under different subdomain can set the their document.domain to a same domain, and then then can share the same cookie or communicate
Cross-Origin Resource Sharing