jQuery(document).ready(heightTest);
jQuery(window).load(heightTest);
jQuery(window).resize(heightTest);

function heightTest() {
	var windowHeight = jQuery(window).height();
	var documentHeight = jQuery(document).height();
	var headerHeight = jQuery('#header').height();
	var mainHeight = jQuery('#main').height();
	var footerHeight = jQuery('#footer').height();
	if ((headerHeight + mainHeight + footerHeight) > windowHeight) {
		jQuery('#footer').css({'position' : 'relative', 'top' : '84'});
	} else {
		jQuery('#footer').css({'position' : 'fixed', 'bottom' : '0'});
	}
}