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Javascript Window Learning Notes

Source: Internet
Author: User
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The 1.window object is to relate the browser to JavaScript.

2. The global variable (var a) is the property of the Window object, and the global function (Var a={}) is the method of the Window object.

3.window.document.getelementbyid ("header"); Is the method of the Window object.

4. Get the browser window size

For Internet Explorer, Chrome, Firefox, Opera, and Safari:

    • Window.innerheight-Interior height of the browser window
    • Window.innerwidth-Interior width of the browser window

For Internet Explorer 8, 7, 6, 5:

    • Document.documentElement.clientHeight
    • Document.documentElement.clientWidth

Or

    • Document.body.clientHeight
    • Document.body.clientWidth

5.Window screen to get width and height

    • Screen.availwidth-Available screen widths
    • Screen.availheight-The available screen height

Note: Remove the width and height of the window's taskbar

The 6.JavaScript Window Location object is used to obtain the address (URL) of the current page and redirect the browser to a new page

    • Location.hostname returns the domain name of the web host
    • Location.pathname returns the path and file name of the current page
    • Location.port returns the port of the web host (80 or 443)
    • Location.protocol returns the Web protocol used (HTTP///https://)

7.JavaScript Window History

    • Window.history.back ()-Same as clicking Back button in browser
    • Window.history.forward ()-Same as clicking the button in the browser forward

8.JavaScript message box

Warning Box: Confirm alert ("text")

Confirm Box: Confirm + Cancel Confirm ("text"), "confirm" return value is true; "Cancel" return value is False

Prompt box: Confirm + Cancel Prompt ("text", "Default value"), "confirm" return value is input value; "Cancel" return value is null

9.JavaScript Chronograph

SetTimeout ()
future execution of code at some time
Cleartimeout ()
Cancel settimeout ()
setTimeout () syntax: Var t=settimeout ("javascript statement", MS)
Example: Infinite loop timer 
<HTML><Head><Scripttype= "Text/javascript">varC=0varTfunctionTimedcount () {document.getElementById ('txt'). Value=C c=C+1T=SetTimeout ("Timedcount ()", +) }</Script></Head><Body><form><inputtype= "button"value= "Start count!"OnClick= "Timedcount ()"><inputtype= "text"ID= "txt"></form></Body></HTML>

Cleartimeout () Syntax: cleartimeout (settimeout_variable)

Example: In the example above, add the following function to stop the timer.

function Stopcount () {cleartimeout (t)}

Javascript Window Learning Notes

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