Popup box alert is a box which will help your users to know the important message.
This is a simple popup alert box in which you can easily give your message to users and user don’t do nothing without close that box, you can use it as welcome message or alert messages at some places.
Steps To Do it!
Step 1: Choose your blog and go to your blogger blog “Settings” option
Step 2: In “Setting” option there is a Click on “Template” option
Step 3: Click on “Edit HTML” and go to <head> tag
Step 4: Alert script
alert(“Hello! I am an alert box!!”);
If this helped then please share.