How to change the style of alert box?
css, javascript
Solution
The alert box is a system object, and not subject to CSS. To do this style of thing you would need to create an HTML element and mimic the `alert()` functionality. The jQuery UI Dialogue does a lot of the work for you, working basically as I have described: Link.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>jQuery UI Dialog - Default functionality</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
$( function() {
$( "#dialog" ).dialog();
} );
</script>
</head>
<body>
<div id="dialog" title="Basic dialog">
<p>This is the default dialog which is useful for displaying information. The dialog window can be moved, resized and closed with the 'x' icon.</p>
</div>
</body>
</html>
Problem
I need to change the style of the "OK" Button in an alert box. ``` <head> <script type="text/javascript"> function show_alert() { alert("Hello! I am an alert box!"); } </script> </head> <body> <input type="button" onclick="show_alert()" value="Show alert box" /> </body> ```