Javascript: 8M Greba feminista

8m_greba_feminista.js

/*
2018ko Martxoaren 8an greba feminista, goizeko 11etatik 15tara, arratsaldeko 18tatik 22tara
*/
(function()
{
	function setModal()
	{
		var w = window,
		    d = document,
		    e = d.documentElement,
		    g = d.getElementsByTagName('body')[0],
		    x = w.innerWidth || e.clientWidth || g.clientWidth,
		    y = w.innerHeight|| e.clientHeight|| g.clientHeight;

		var div = document.createElement('div');
		div.className = 'greba8m';
		div.style.display = 'block';
		div.style.position = 'fixed';
		div.style.top = 0;
		div.style.left = 0;
		div.style.backgroundColor = '#000000';
		div.style.width = '100%';
		div.style.height = '1000px';
		div.style.opacity = '0.8';
		div.style.overflow = 'hidden';
		div.style.zIndex = '999';

		var div2 = document.createElement('div');
		div2.className = 'greba8m';
		div2.style.display = 'block';
		div2.style.position = 'fixed';
		div2.style.top = (y / 2 - 189) +"px";
		div2.style.left = (x / 2 - 258) +"px";
		div2.style.color = '#000000';
		div2.style.backgroundColor = '#ffffff';
		div2.style.width = '515px';
		div2.style.height = '378px';
		div2.style.zIndex = '1000';

		var img = document.createElement('img');
		img.src = 'https://grebafeminista.files.wordpress.com/2018/02/pegatapequec3b1a2.jpg';
		img.alt = 'Gune hau greba feministarekin bat'
		img.style.width = '515px';
		img.style.height = '378px';
		div2.appendChild(img);

		var body = document.getElementsByTagName('body')[0];

		body.appendChild(div);
		body.appendChild(div2);
	}

	var d = new Date();
	var dd =
	{
		'y': d.getFullYear(),
		'm': window.parseInt(d.getMonth())+1,
		'd': d.getDate(),
		'h': d.getHours(),
		'i': d.getMinutes(),
		's': d.getSeconds()
	};
	if(dd['y']===2018 && dd['m']===3 && dd['d']===8)
	{
		if((dd['h']>10 && dd['h']<15) || (dd['h']>17 && dd['h']<22))
		{
			setModal();
			window.setInterval(function()
			{
				var a = document.querySelectorAll('.greba8m');
				if(a.length<2)
					setModal();
			}, 1 * 5000);
		}
	}
})();