Re-orienting social images & limiting such to posts in WPress

Could someone help me work through this php issue? I am a novice when dealing with php code for the most part. I trust I need help with php, css and maybe even WordPress itself in solving two issues here. 1) as indicated at the end of the code snippet the resulting icons return as a vertical list on a website page. I would like them to be in a horizontal format following the Title “Share this:” 2) At the moment, these icons appear at the bottom of both ‘pages’ and ‘posts’. I would like them to appear only for ‘posts’. I trust I need php conditional code added to do so.
I was looking for a simple way of posting things from a website to email, facebook and twitter and this WordPress plugin seemed to fill the bill without any major overload as indicated by alternatives (except for the two changes I detailed above.) I can’t seem to raise the author to work it through!!!
Plug In code snippet:
<?php
set_time_limit(20);
ini_set(“memory_limit”,“128M”);
function jw_share_this_links($content) {
$id = get_the_ID();
$title = get_the_title($id);
$url = get_permalink($id);
$content .= "
";
$content .= "<div class=\“jwsharethis\”>
"; (There is no corresponding css entries)
$content .= "Share this:
";
$content .= "<br />
";
$content .= "<a href=\“mailto:?subject=” . rawurlencode($title) . “&body=” . rawurlencode($url) . “\”>
“;
$content .= “<img src=\”” . plugins_url(‘email.png’, FILE) . “\” alt=\“Share this page via Email\” />
";
$content .= "</a>
“;
$content .= “<a target=\”_blank\” href=\“http://www.facebook.com/sharer.php?u=” . urlencode($url) . “&t=” . urlencode($title) . “\”>
“;
$content .= “<img src=\”” . plugins_url(‘fb.png’, FILE) . “\” alt=\“Share this page via Facebook\” />
";
$content .= "</a>
“;
$content .= “<a target=\”_blank\” href=\“http://twitter.com/intent/tweet?text=I+like+” . urlencode($url) . “&title=” . urlencode($title) . “\”>
“;
$content .= “<img src=\”” . plugins_url(‘twitter.png’, FILE) . “\” alt=\“Share this page via Twitter\” />
";
$content .= "</a>
";
$content .= "</div>
";
return $content;
}
add_filter (‘the_content’, ‘jw_share_this_links’);
?>

Results can be seen in a sample website page (manitoba214.org/right2housing/?page_id=13). Icons are included in the plugin.