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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Javascript - Popup alert</title> </head> <body onload="alert('It is an alert. Webpage is Loaded.')"> <h2>Using "alert()" method to create alert box.</h2> <p>You can pass direct string or string variable in the alert method to display message.</p> <button onclick="alertBox()">Get Alert</button> <script> function alertBox(){ alert("This is a direct string alert message"); var message = "This is variable string"; alert(message); } </script> </body> </html>
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