Center Point Multi Solutions

getElementById() is a JavaScript function that returns an element that has been granted a certain ID attribute and is an exact match for the specific string. An HTML element ID attribute must be unique.

Once we have a reference to any element in JavaScript through the use of getElementById(), we can then get a reference to its child elements through the children.length child attribute and finally get a count of how many child elements exist by invoking the length property.

Additionally, any attributes that are defined as part of these elements can also be manipulated with JavaScript code.