JavaScript (JS) noHref Example: HTML DOM Objects – Area Object – JavaScript (JS) noHref Example

Posted by on Friday, February 5, 2010 · Leave a Comment 

JavaScript (JS) noHref Example: HTML DOM Objects – Area Object – JavaScript (JS) noHref Example

Purpose: – Illustrates the for the .

View Other Area Object Properties

Prerequistes:

Syntax: AreaObject.noHref=”nohref” – Allows you to access the noHref for an AreaObject

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

  3. Add New folder named “HTMLDOMObjects”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder should be: HTMLDOMObjects
  4. Add New subfolder to “HTMLDOMObjects” folder named “DOMArea”
    • Right-click folder named “HTMLDOMObjects” in solution explorer;
    • add new folder;
    • name of folder should be: DOMArea
  5. Add New subfolder to “DOMArea” subfolder named “AreaObjectProperties”
    • Right-click subfolder named “DOMArea” in solution explorer;
    • add new folder;
    • name of folder should be: AreaObjectProperties
  6. Add HTML Page Named noHref to AreaObjectProperties subfolder
    • Right-click AreaObjectProperties subfolder;
    • add new item;
    • Select HTML Page
    • HTML Page name should be noHref
  7. Click on copy code in code below to copy code into HTML Page noHref.htm
  8. Right-click on HTML page noHref.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: noHref</title>
        <!-- 
        ***************************************************
        * This example is from http://idealprogrammer.com *
        ***************************************************
        Note:
        coords for rect = "upperleftx,upperlefty,bottomrightx,bottomrighty"
        coords for circle = x,y,r where x and y are center and r is radius
        coords for poly = x1,y1,x2,y2,...
        -->
       </head>
      <body>
      <a href="http://idealprogrammer.com">Ideal Programmer</a><br /><br />
    <img src ="http://idealprogrammer.com/wp-photos/goldbottle.jpg" width="200" height="200" alt="Planets"
    usemap ="#goldmap" /><br /> <br />
 
    <map name="goldmap" id="goldmapid">
    <area id="Area1" shape="rect" coords="0,0,100,100" href="http://www.google.com" alt="google" accesskey="1" />
    <area id="Area2" shape="rect" coords="100,0,200,100" nohref="nohref" href="http://www.yahoo.com" alt="yahoo" accesskey="2" />
    <area id="Area3" shape="rect" coords="0,100,100,200" href="http://idealprogrammer.com" alt="idealprogrammer" accesskey="3" />
    <area id="Area4" shape="rect" coords="100,100,200,200" href="http://progressmonitor.com" alt="progressmonitor" accesskey="4" />
 
    </map>
    <script type="text/javascript">
 
        //*****************************************************
        // DOM Objects
        //*****************************************************
 
 
        //*****************************************************
        //    ***    Area Object Property   ***
        //*****************************************************
 
        //*****************************************************
        // noHref
        //*****************************************************
 
        //    SYNTAX:
        //    areaObject.noHref="nohref"  Allows you to access the noHref
        //               property of a areaObject in an image map. If noHref is
        //               true the link is not active.
 
        // Two ways to retrieve noHref   
        //   1. GetElementsByTagName
        myObject = document.getElementsByTagName('area')[0];
        document.write("Area1 - Using getElementsByTagName : " + myObject.noHref);
        document.write("<br />");
        //   2. GetElementById
        document.write("Area2 - Using getElementById: ");
        document.write(document.getElementById('Area2').noHref);
 
        document.write("<br /><br />");
        // Two ways to assign noHref
 
        //   1. GetElementById
        myArea3 = document.getElementById('Area3');
        myArea3.noHref = "nohref";
        document.write("<br />Area3 changed to nohref: ", myArea3.noHref);
 
        //   2. GetElementsByTagName      
        myArea4 = document.getElementsByTagName('area')[3];
        myArea4.noHref = "nohref";
        document.write("<br />Area4 changed to nohref: ", myArea4.noHref)
 
 
    </script>
 
 
      </body>
    </html>

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