I found an answer.  I hope it helps someone else.

//Must set BPID, WebPageElementID, and LFFormsServer
var BusinessProcessID = '3'; //BPID
var WebPageElementID = 'div1'; //The name of the element on the page that you want to embed the iframe within
var LFFormsServer = 'https://server.domain.com';

var IFrameID = 'object' + BusinessProcessID //The iframe ID is 'object' and the BPID

var lf = new LaserficheForms.Form(document.getElementById('ctl00_divCenter'),
	{
		bpid: BusinessProcessID
		,host: LFFormsServer + '/Forms'
	});

$(document).ready(function(){
	document.getElementById(IFrameID).style.height = '100%'; //after the page is loaded find the iframe and set the height
});