I want to use invisible tables to order my website and I'm using Frontpage [though I know HTML]. I want a table on the left for the index and also a table alongside that for the main content. How do I go about it?
Corwings has provided a complete answer, but I sense that you're really asking how to specifically do this in frontpage. If this is the case, select "table" from toolbar, highlight "1x2" and leftclick. This will give you a table with two adjacent cells; place the cursor somewhere within the table and rightclick "table properties" margin=0, if you want to manipulate cell data and span, rightclick in the appropriate cell, select "cell properties" and leftclick your choice.
an additional comment: after completing your layout its a good idea to check the result in ns or mozilla, you may need to rework the table/cell attributes (in HTML view, tweak the parameters, note percent vs pixels) and, if needed, adjust accordingly to get an acceptable compromise in those browsers.