Code for adding pop-up links to list items and to Library items.

Full Code For a List Item: 

<a onclick="javascript:NewItem2(event, &quot;http://SiteName/_layouts/listform.aspx?PageType=8&amp;ListId={83747BB4-49C6-4181-B4A3-F8C6B611846D}&amp;RootFolder=&quot;);  javascript:return false;" href="/_layouts/listform.aspx?PageType=8&amp;ListId={83747BB4-49C6-4181-B4A3-F8C6B611846D}&amp;RootFolder=" target="_self"> Submit Feedback</a>

Full Code for a Library Item: 

<a href="http://SiteName/_layouts/Upload.aspx?List={94AC86A8-6774-4822-A197-A98542251678}&amp; RootFolder=" onclick="javascript:NewItem2(event, &quot;http://SiteName/_layouts/Upload.aspx?List={94AC86A8-6774-4822-A197-A98542251678}&amp;RootFolder=&quot;); javascript:return false;" target="_self"> Upload a Document</a>

Source: http://erikswenson.blogspot.dk/2010/09/how-to-create-hyperlink-to-modal-pop-up.htm