Passing Meta-knowledge About A Form Element

I need to create a table where each element has certain specific properties.

For example, elements in the first column should always have a range of
0-100, and increment by 1. Elements in column 2 might have a range of
0-360, and increment by 0.1. Altogether there might be 8 elements in
each row.

Since this is basically the same javascript function over and over, I
wonder if there is a way to create some <input> element that might
contain this knowledge in a way that javascript can access it.

For example, could I have

<input type="text" class="percent" onkeypress="javascript:blah(event)">

where the javascript function could retrieve the class value?

Since this is going to be fairly complex, I'd like to make it fairly
self-documenting and simple. It's much easier for a maintainer to
understand class="precent" than "javascript:blah(0,100,1,event)",
especially since I am also going to have to pass navigation information
(is this a border element in the table? what are my neighbors? kind
of information... - so that the actual information might end up being
javascript:blah(0,100,1,5,21,16,18,0,1,0,0,event) to denote the data
type, the 4 neighbors, and the 4 border conditions....