/* Fix the position of an element when it is about to be scrolled off-screen */
function smartPosition(obj) {
	if ( jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 7 ) {
		return;
	}
	
	jQuery(window).scroll(function() {
		// Detect if content is being scroll offscreen.
		if ( (document.documentElement.scrollTop || document.body.scrollTop) >= jQuery(obj).offset().top) {
			jQuery('body').addClass('smartposition');
		} else {
			jQuery('body').removeClass('smartposition');
		}
	});
};