First we need to place javascript to recognise whether our syndetic cover is on the current full view page. 
This can be done in the full-999-body by entering the following javascript code:

<Code sample>
<script>
//Look for Syndetics
var entry = '$0100';
 if (entry == "More? Click cover") {
        var syndet = 'yes' }
</script>

</Code sample>
In our full-999-body we use the standard $0100 and $0200 that was created by ExLibris.  Here we are looking at the $0100 entry, which is our headings, for ‘More? Click cover” which is displayed with all our syndetic covers.  If an entry is found anywhere on the page, we create a variable ‘syndet’ with the value of ‘yes’.
 
Next, we get to the main part of the code. In the file full-set-tail, we are looking (in Javascript again) for the syndet value and then looking at the google return and displaying as we want to.

<Code sample>
<script>
// Function to process GBS info and update the dom.
function ProcessGBSBookInfo(booksInfo) {
// Force the use of ISBN only - no OCLC numbers.
var idgoogle = "$0800";
if (idgoogle.indexOf("ISBN")!=0)
{
return;
}
for (isbn in booksInfo) {
var url_elem = document.getElementById(isbn);
var pic_elem = document.getElementById("google_book");
var mytable = document.getElementById('GBS') ;
var bookInfo = booksInfo[isbn];
if (bookInfo) {
url_elem.href = bookInfo.info_url;
url_elem.style.display = '';   
// Display link by making table visible if google matches ISBN.
mytable.style.visibility = 'visible' ;
//Get JSON Response for GBS link text, according to the type of availability on the item (more information on the google books api page)
if(bookInfo.preview == "full") {
                         GBSlink = "Full View";
                }
                if(bookInfo.preview == "partial") {
                        GBSlink = "Partial View";
                }
                if(bookInfo.preview == "noview") {
                        GBSlink = "Limited Preview";
                }

 
if (bookInfo.thumbnail_url)
{
pic_elem.src = bookInfo.thumbnail_url;
pic_elem.style.display = '';
}
}
}
}
</script>
<!--Statement for Linking to Google Book Search. MW 26/08/2008-->
<script type="text/javascript">
// link to google when no syndetics cover exists. Variables split to enable GBSlink text variable to be included.
if (syndet != "yes")
{
//Here we can see that I have created a ‘<thead>’ style with it’s visibility hidden. The ID of GBS matches the variable for mytable stated
earlier, which sets the ‘<thead>’ to visible, as we want our GBS image to appear at the top of the page.
document.write (" <thead style=\"visibility:hidden\" id=\"GBS\"><tr><td class=\"td1\" id=\"bold\" valign=\"top\" width=\"15%\" nowrap=\"nowrap\">Google Book Search</td><td class=\"td1\"><a id=\"$0800\" target=\"_blank\" style=\"display:none\;\"> <img style=\"display:none\;\" alt=\"Google Book Search - Click for more information\" vspace=\"2\" hspace=\"2\" align=\"middle\" border=\"0\" id=\"google_book\"/>");
document.write (GBSlink);
document.write ("</a></thead></tr></td>");
}
else
{
//link to google when syndetics cover exists. Variables split to enable GBSlink text variable to be included.
//This time we have a ‘<tr>’ set with hidden, here we want the GBS link to display at the bottom of our page.
document.write(" <tr style=\"visibility:hidden\" id=\"GBS\"><td class=\"td1\" id=\"bold\" valign=\"top\" width=\"15%\" nowrap=\"nowrap\">Google Book Search</td><td class=\"td1\"> <a id=\"$0800\" target=\"_blank\" style=\"display:none\;\">");
document.write(GBSlink);
document.write ('</a></tr></td>');
}
</script>
<script src="$0700"></script> 
<script>document.write(GBSlink);</script>
</Code sample>