JavaScript (JS) id Example: HTML DOM Objects – Body Object – JavaScript (JS) id Example
3-Minute Video Tour of LearnVisualStudio.NET by Bob Tabor
Premium (Not Free) Video Tutorials
Free Video Tutorials & Free Tools
JavaScript (JS) id Example: HTML DOM Objects – Body Object – JavaScript (JS) id Example
Purpose: – Illustrates the JavaScript syntax for the Body Object id Property .
Prerequistes:
- Install Visual Web Developer 2008
Syntax: BodyObject.id="idname" – Allows you to access the id for a BodyObject.
Restrictions: None
Notes:
- You can build your own library of syntax examples by using same web site over and over and just add new files to it.
Instructions:
- Use Visual Web Developer 2008
- Create new web site;
- Click File/New Web Site
- Select ASP.NET Website Template
- Select C-Sharp for language
- name of Web Site could be JavaScript_Syntax.
- Add New folder named "HTMLDOMObjects"
- Right-click project name in solution explorer;
- add new folder;
- name of folder should be: HTMLDOMObjects
- Add New subfolder to "HTMLDOMObjects" folder named "DOMBody"
- Right-click folder named "HTMLDOMObjects" in solution explorer;
- add new folder;
- name of folder should be: DOMBody
- Add New subfolder to "DOMBody" subfolder named "BodyObjectProperties"
- Right-click subfolder named "DOMBody" in solution explorer;
- add new folder;
- name of folder should be: BodyObjectProperties
- Add HTML Page Named id to BodyObjectProperties subfolder
- Right-click BodyObjectProperties subfolder;
- add new item;
- Select HTML Page
- HTML Page name should be id
- Click on copy code in code below to copy code into HTML Page id.htm
- Right-click on HTML page id.htm and select view in browser
| HTML | | | | ? |
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
<html> |
<head> |
<title>IdealProgrammer.com: id </title> |
<!-- |
*************************************************** |
* This example is from http://idealprogrammer.com * |
*************************************************** |
--> |
<style type="text/css" id="myStyle"> |
.myButtons |
{ |
font-size:large; |
color:red; |
} |
.myButtons input |
{ |
color:Blue |
} |
.myButton2 |
{ |
font-size:small; |
} |
.myButton2 input |
{ |
font-style :italic |
} |
.myButton3 |
{ |
background-color:#d0e4fe; |
} |
.myButton3 input |
{ |
font-weight:600 |
} |
</style> |
<script type="text/javascript"> |
//**************************************************************** |
// Set Cookie |
//**************************************************************** |
function Set_Cookie( name, value, expires, path, domain, secure ) |
{ |
// set time, it's in milliseconds |
var today = new Date(); |
today.setTime( today.getTime() ); |
/* |
if the expires variable is set, make the correct |
expires time, the current script below will set |
it for x number of days, to make it for hours, |
delete * 24, for minutes, delete * 60 * 24 |
*/ |
if ( expires ) |
{ |
expires = expires * 1000 * 60 * 60 * 24; |
} |
var expires_date = new Date( today.getTime() + (expires) ); |
document.cookie = name + "=" +escape( value ) + |
( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + |
( ( path ) ? ";path=" + path : "" ) + |
( ( domain ) ? ";domain=" + domain : "" ) + |
( ( secure ) ? ";secure" : "" ); |
} |
//**************************************************************** |
// Get Cookie |
//**************************************************************** |
// this fixes an issue with the old method, ambiguous values |
// with this test document.cookie.indexOf( name + "=" ); |
function Get_Cookie(check_name) { |
// first we'll split this cookie up into name/value pairs |
// note: document.cookie only returns name=value, not the other components |
var a_all_cookies = document.cookie.split(';'); |
var a_temp_cookie = ''; |
var cookie_name = ''; |
var cookie_value = ''; |
var b_cookie_found = false; // set boolean t/f default f |
for (i = 0; i < a_all_cookies.length; i++) { |
// now we'll split apart each name=value pair |
a_temp_cookie = a_all_cookies[i].split('='); |
// and trim left/right whitespace while we're at it |
cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, ''); |
// if the extracted name matches passed check_name |
if (cookie_name == check_name) { |
b_cookie_found = true; |
// we need to handle case where cookie has no value but exists (no = sign, that is): |
if (a_temp_cookie.length > 1) { |
cookie_value = unescape(a_temp_cookie[1].replace(/^\s+|\s+$/g, '')); |
} |
// note that in cases where cookie is initialized but no value, null is returned |
return cookie_value; |
break; |
} |
a_temp_cookie = null; |
cookie_name = ''; |
} |
if (!b_cookie_found) { |
return null; |
} |
} |
</script> |
</head> |
<body id="myBodyID" class="myButtons"> |
Please click Buttons to change id assigned to body:<br /><br /> |
<!--using onclick to set a cookie and reload page; |
when page is reloading, we check that cookie to assign different styles to body |
--> |
<input id="Button1" type="button" value="button" onclick="javascript: Set_Cookie( 'mycookie', '1', 30, '/', '', '' ); window.location.reload();" /><br /><br /> |
<input id="Button2" type="button" value="button - id2" onclick="javascript: Set_Cookie( 'mycookie', '2', 30, '/', '', '' ); window.location.reload();"/><br /><br /> |
<input id="Button3" type="button" value="button - id3" onclick="javascript: Set_Cookie( 'mycookie', '3', 30, '/', '', '' ); window.location.reload();"/><br /><br /> |
<script type="text/javascript"> |
//***************************************************** |
// DOM Objects |
//***************************************************** |
//***************************************************** |
// *** Body Object Properties *** |
//***************************************************** |
//***************************************************** |
// id |
//***************************************************** |
// SYNTAX: |
// object.id="id" Allows you to retrieve or assign id for |
// body |
//***************************************************** |
// Two ways to retrieve id |
//***************************************************** |
document.write("<strong>Demonstrating Two Ways to Retrieve Property</strong><br />") |
// 1. GetElementsByTagName |
myObject=document.getElementsByTagName('body')[0]; |
document.write("1. Using getElementsByTagName: " + myObject.id); |
document.write("<br />"); |
// 2. GetElementById |
document.write("2. Using getElementById: "); |
document.write(document.getElementById('myBodyID').id); |
document.write("<br />"); |
document.write("<br />"); |
//***************************************************** |
// Two ways to assign id |
//***************************************************** |
// using cookies to change property and style on the fly |
if (Get_Cookie('mycookie')) { |
ButtonNum = (Get_Cookie('mycookie')); |
} |
else { |
ButtonNum = '1'; |
} |
// 1. GetElementById |
if (ButtonNum == '2') { |
document.write("<strong>Demonstrating Assigning Property with GetById</strong><br />") |
document.getElementById('myBodyID').className = "myButton2" |
document.getElementById('myBodyID').id = "myID2" |
document.write("Body id changed to myID2: " + document.getElementById('myID2').id + "<br />"); |
} |
// 2. GetElementsByTagName |
if (ButtonNum == '3') { |
document.write("<strong>Demonstrating Assigning Property with GetElementsByTagName</strong><br />") |
myThirdButton = document.getElementsByTagName('body')[0]; |
myThirdButton.className = "myButton3"; |
myThirdButton.id = "myID3"; |
document.write("Body id changed to myID3: " + myThirdButton.id); |
} |
</script> |
</body> |
</html> |
Related posts:
- JavaScript (JS) dir Example: HTML DOM Objects – Body Object – JavaScript (JS) dir Example JavaScript (JS) dir Example: HTML DOM Objects - Body Object...
- JavaScript (JS) className Example: HTML DOM Objects – Body Object – JavaScript (JS) className Example JavaScript (JS) className Example: HTML DOM Objects - Body Object...
- dir Example JavaScript (JS): HTML DOM Objects – Anchor Object – dir Example JavaScript (JS) dir Example JavaScript (JS): HTML DOM Objects - Anchor Object...
- Body Example JavaScript (JS): HTML DOM Objects – Document Object Properties – Body Example JavaScript (JS) Body Example JavaScript (JS): HTML DOM Objects - Document Object...
- JavaScript (JS) dir Example: HTML DOM Objects – Area Object – JavaScript (JS) dir Example JavaScript (JS) dir Example: HTML DOM Objects - Area Object...
Related posts brought to you by Yet Another Related Posts Plugin.
Comments
One Response to “JavaScript (JS) id Example: HTML DOM Objects – Body Object – JavaScript (JS) id Example”Trackbacks
Check out what others are saying about this post...[...] rest is here: HTML DOM Objects – Body Object – JavaScript id Example … Share and [...]