code to capture first click of any field of the form

I have to fire below tracking; once on first click of any field of the form
$(document).ready(function () {
var s = s_gi(s_account);
s.linkTrackVars = "None";
s.linkTrackEvents = "None";
s.trackDownloadLinks = false;
s.trackExternalLinks = false;
s.linkTrackVars = 'prop1,eVar1,events';
s.prop1 = s.eVar1 = 'Registration form';
s.linkTrackEvents = 'event1';
s.events = 'event1';
s.tl(this, 'o', s.prop1);
});

So I want code to capture first click of any field of the form

Topic Participants
ashsurve
jakecigar

code to capture first click of any field of the form

code to capture first click of any field of the form

Topic Participants

ashsurve

jakecigar