class.wp-scripts.php timeout on line 19

I’m getting the following error message:

Fatal error: Maximum execution time of 30 seconds exceeded in D:\Hosting\7531564\html\blog\wp-includes\class.wp-scripts.php on line 19

It doesn’t happen all the and there is no particular time of day that is does. It occurs randomly. I haven’t modified that file and it appears to be standard. We have called the host and they say nothing is going wrong on their end. Any help anyone can give would be greatly appreciated.

This is the address of the blog:

http://www.getwellstaywellathome.com/blog

This is line 19 of the class.wp-scripts.php file:

class WP_Scripts extends WP_Dependencies {
var $base_url; // Full URL with trailing slash
var $content_url;
var $default_version;
var $in_footer = array();
var $concat = ”;
var $concat_version = ”;
var $do_concat = false;
var $print_html = ”;
var $print_code = ”;
var $ext_handles = ”;
var $ext_version = ”;
var $default_dirs;

function __construct() {
do_action_ref_array( ‘wp_default_scripts’, array(&$this) );
}

Thanks in advance,

Craig