Write down following code in the body section of html document

<form id="ff1">
        <input type="text" id="txtFocusEvent" onfocus="alert('Textbox control got focus.')" />
</form>

Output of the above code snippet is as follows

As soon as user click on text box control for writing some text then an alert window is displayed with a message that Textbox control got focus.

After clicking on text box…