How to call Javascript as header for single.php

I am having to display both adsense and cpalead javascript in all posts,so while making itself calling cpalead javascript for the header,what should I do with this?

single.php starts with

<?php get_header(); ?>
<?php
global $options;
foreach ($options as $value) {
if (get_settings( $value['id'] ) === FALSE) { $$value['id'] = $value['std']; } else { $$value['id'] = get_settings( $value['id'] ); } }
?>
<div id="container">

<div id="left-div">

<?php if (have_posts()) : ?>

<?php while (have_posts()) : the_post(); ?>

 

If you want to display something on the top of all pages you have to write it in header.php of the theme directory.

 

What if I want to display it in only single.php ie single posts alone?

 

You mean on the header place of every single post?

 

You are exactly right.Header on ever single post but not on any pages or home page.

 

So write this in the header.php

if(is_single()){
   /* Here write the code which you want to display */
}

Code (markup):