Introduction



The javascript alert is a dialogue box that pops up and takes the faces away from current window and focus to read message

Why is it helpful



* if we closes a page without saving we often saw a message
*You can add message to user eg "NOT FOR MINORS"
*An error message
*Conformation message
Code:
<html>
<body>
<form>
<input type="button" onclick="alert('Your message eg:-FOR MINORS')" value="Click here">
</form>
</body>
</html>