GetElementsByTagName Example JavaScript (JS): HTML DOM Objects – Document Object Methods – GetElementsByTagName Example JavaScript (JS)

Posted by on Wednesday, January 6, 2010 · Leave a Comment 

GetElementsByTagName Example JavaScript (JS): HTML DOM Objects – Document Object Methods – GetElementsByTagName Example JavaScript (JS)

Purpose: – Illustrates the for the .

View Other HTML DOM Document Objects

Prerequistes:

Syntax: getElementsByTagName(“elementTagName”) – Provides access to a collection of objects with the specified tagname

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 “DocumentObjectMethods”
    • Right-click folder named “HTMLDOMObjects” in solution explorer;
    • add new folder;
    • name of folder should be: DocumentObjectMethods
  5. Add HTML Page Named GetElementsByTagName to DocumentObjectMethods subfolder
    • Right-click DocumentObjectMethods subfolder;
    • add new item;
    • Select HTML Page
    • HTML Page name should be GetElementsByTagName
  6. Click on copy code in code below to copy code into HTML Page GetElementsByTagName.htm
  7. Right-click on HTML page GetElementsByTagName.htm and select view in browser
    8. < !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: getElementsByTagName() </title>
    <!-- 
    ***************************************************
    * This example is from http://idealprogrammer.com *
    ***************************************************
    -->
 
    <script type="text/javascript">
        //*****************************************************
        // DOM Document
        //*****************************************************
 
 
        //*****************************************************
        //    ***    Document Object Methods   ***
        //*****************************************************
 
        //*****************************************************
        // getElementsByTagName()
        //*****************************************************
 
        //    SYNTAX:
        //    getElementsByTagName("tagName") - Provides access to a 
        //    collection of objects with the specified tagname
 
        function getText(elementTagName) 
        {
            var arr = new Array();
            arr = document.getElementsByTagName(elementTagName);
            var str = "total elements with name \"input\" = " + arr.length + "<br />";
            for (var i = 0; i < arr.length; i++) 
            {
                var myElement = document.getElementsByTagName(elementTagName).item(i);
                str+= myElement.id + " =  " + myElement.value + "<br />";
            }
            var AnotherDoc = document.open("text/html", "replace");
            AnotherDoc.write(str);
            AnotherDoc.close()
        }
 
 
</script>
   </head>
  <body>
   Text1: <input id="Text1" name="textinput" type="text" value="This" /><br />
   Text2: <input id="Text2" name="textinput" type="text" value="is" /><br />    
   Text3: <input id="Text3" name="textinput" type="text" value="cool" /><br />    
   <input id="Button1" type="button" value="submit" onclick="getText('input')" />
 
 
 
  </body>
</html>

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