JavaScript (JS) id Example: HTML DOM Objects – Base Object – JavaScript (JS) id Example

JavaScript (JS) id Example: HTML DOM Objects – Base Object – JavaScript (JS) id Example

Purpose: – Illustrates the for the .

View Other Base Object Properties

Prerequistes:

Syntax: BaseObject.id=”id” – Allows you to access the id for an BaseObject.

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:

  1. Use Visual Web Developer 2008
  2. 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.
  3. Folder

  4. Add New folder named “HTMLDOMObjects”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder should be: HTMLDOMObjects
  5. Add New subfolder to “HTMLDOMObjects” folder named “DOMBase”
    • Right-click folder named “HTMLDOMObjects” in solution explorer;
    • add new folder;
    • name of folder should be: DOMBase
  6. Add New subfolder to “DOMBase” subfolder named “BaseObjectProperties”
    • Right-click subfolder named “DOMBase” in solution explorer;
    • add new folder;
    • name of folder should be: BaseObjectProperties
  7. Add HTML Page Named id to BaseObjectProperties subfolder
    • Right-click BaseObjectProperties subfolder;
    • add new item;
    • Select HTML Page
    • HTML Page name should be id
  8. Click on copy code in code below to copy code into HTML Page id.htm
  9. Right-click on HTML page id.htm and select view in browser
View Example In Browser
< !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 *
    ***************************************************
 
 
    -->
 
    <base id="myBaseID" href="http://myqol.com" />
 
   </head>
  <body>
      <a href="events_calendar.aspx" id="idEvents">Events</a><br /><br />
      <a href="news_list.aspx" id="idNews">News</a><br /><br />
      <a href="presenters.aspx" id="idPresenters">Presenters</a><br /><br />
      <a href="free_trial.aspx" id="idFreeTrial">Free Trial</a><br /><br />
 
   <script type="text/javascript">
       //*****************************************************
       // DOM Objects
       //*****************************************************
 
 
       //*****************************************************
       //    ***    Base Object Properties   ***
       //*****************************************************
 
       //*****************************************************
       // id
       //*****************************************************
 
       //    SYNTAX:
       //    object.id=id  Allows you to retrieve or assign  
       //               id to Base object
 
       // Two ways to retrieve id   
       //   1. GetElementsByTagName
            myObject=document.getElementsByTagName('base')[0];
            document.write("Base - Using getElementsByTagName : " + myObject.id);
            document.write("<br />");
      //   2. GetElementById
            document.write("Base - Using getElementById: ");
            document.write(document.getElementById('myBaseID').id);
 
            document.write("<br /><br />");
       // Two ways to assign id
 
            //   1. GetElementById
            myThirdElement = document.getElementById('myBaseID');
            myThirdElement.id = "newbaseid";
            document.write("<br />IdealProgrammer id changed to newbaseid: ", myThirdElement.id);
 
       //   2. GetElementsByTagName      
            myFourthElement = document.getElementsByTagName('base')[0];
            myFourthElement.id = "newbaseid2";
            document.write("<br />ProgressMonitor id changed to newbaseid2: ", myFourthElement.id)
 
</script>
 
  </body>
</html>