penders - 5:10 pm on Dec 12, 2012 (gmt 0)

What do you mean by "webkit"? (Your own HTML/JavaScript ?)

dw_Tooltip.content_vars = { L1: 'Content is here;, L2: 'Content is here; }

You could populate your content_vars object as the page loads, from your DIVs created using your "webkit code". Like you say, the DIVs content would be indexed in the usual way. However, when the page loads, hide the DIVs and copy the content to your content_vars object.