// JavaScript Document

function f_clientHeight() {

	return f_filterResults (

		window.innerHeight ? window.innerHeight : 0,

		document.documentElement ? document.documentElement.clientHeight : 0,

		document.body ? document.body.clientHeight : 0

	);

}



function f_filterResults(n_win, n_docel, n_body) {

	var n_result = n_win ? n_win : 0;

	if (n_docel && (!n_result || (n_result > n_docel)))

		n_result = n_docel;

	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;

}



function sticky_menu() {

	var menuHeight = $("#articles-menu-frame").innerHeight();

	var maxOffset = $("#articles-main-frame").innerHeight()-menuHeight-10;

	var offset = $(document).scrollTop()-130;

	if ($(document).scrollTop() <= 130) offset = 0;

	if ((maxOffset >= offset)) {

		offset += "px";

		$("#articles-menu-frame").animate({top:offset},{duration:300,queue:false});  

	}

	return true;

}



$(document).ready(function() {

						   

	//articles menu

	sticky_menu();

	$(window).scroll(function () {

		sticky_menu();

	});

	$("a.preview-img").fancybox({ 'zoomSpeedIn': 300, 'zoomSpeedOut': 300, 'overlayShow': false }); 



});