HTML DOM Object Getelementbytagname () method

Definition and usage

The getElementsByTagName () method returns a collection of objects with the specified label name.

Grammar

document.getElementsByTagName (tagname)

Description

The getElementsByTagName () method returns elements in the order that they are in the document.

If you pass the special string "*" to the getElementsByTagName () method, it returns a list of all the elements in the document, the order in which they are arranged in the document.

Hints and Notes

Note: strings passed to the getElementsByTagName () method can be case insensitive.

Example 1

document.getElementsByTagName("input") ;  alert (x.length);  } </script>
Example 2
You can use the getElementsByTagName () method to get a list of HTML elements of any type. For example, the following code can get all the tables in the document:
document.getElementsByTagName("table")Alert ("This document contains" + Tables.length + "tables");
Example 3
If you are familiar with the structure of a document, you can also use the getElementsByTagName () method to get a specific element in the document. For example, the following code can get the fourth paragraph in a document:
document.getElementsByTagName("p")[3];
However, we still think that if you need to manipulate a particular element, using the getElementById () method will be more efficient.
HTML DOM Object Getelementbytagname () method