Html Dom Getelementsbyclassname

Getelementsbyclassname () finds all HTML elements with the same class name.
The method returns a collection. Note that it is not an array, although you can also use the [index] method to get the elements.

Common properties and methods for this collection

The Length property, which returns the number of elements of the item (index) method, returns the DOM element labeled index in the collection, with the index as an integer, numbering from 0, or using the [index] way to get    its elements directly.

Attention:
When an element in the collection does not exist in the document structure or does not conform to the filter criteria for the collection, the collection automatically deletes the element.
Getelementsbyclassname () is not valid in Internet Explorer 5,6,7,8.

Html Dom Getelementsbyclassname