here you can have css and javascript....<html>
<head>
<style type="text/css">
body
{
background-color:#d0e4fe;
}
h1
{
colorrange;
text-align:center;
}
p
{
font-family:"Times New Roman";
font-size:20px;
}
</style>< s c r i p t t y p e = " t e x t / j a v a s c r i p t " > f u n c t i o n d i s p l a y _ a l e r t ( ) {
a l e r t ( " H e l l o ! I a m a n a l e r t b o x ! ! " ) ; } < / s c r i p t>
</head>
<body>
<h1>CSS example!</h1>
<p>This is a paragraph.</p>
< i n p u t t y p e = " b u t t o n " o n c l i c k = " d i s p l a y _ a l e r t ( ) " v a l u e = " D i s p l a y a l e r t b o x " />
</body>
</html>