Script Not Picking Up The Url And Adding Tags?

I am using this script which is nearly working correctly, but not quite!

When a user selects some text from the web-page and copies it,the script is supposed to pick up the current web-page url and create a resource box or credit line that is added to the selected text when the data is pasted.

You will see that the meta keywords are used (randomly) as the anchor text and this should be wrapped with the href= tags in order to create a link. Thats the bit that is not workink, but I can not see why.

Here is the complete script.

function init(){
// Options:
var useMetaKeyword = true; // Otherwise, page title
var minLength = 40; // Min selection chars

[Code]....