function playvideo(neuri,yt)
	{
	// elements
	var tbl = document.createElement('table');
	tbl.setAttribute('id','vtbl');
	var tbd = document.createElement('tbody');
	var trw = document.createElement('tr');
	var tcl = document.createElement('td');
	// closer
	var cbut = document.createElement('button');
	cbut.innerHTML = 'Volver';
	cbut.style.cssText = 'margin:2em auto;';
	cbut.onclick = function() { document.getElementById('vtbl').parentNode.removeChild(document.getElementById('vtbl')); }
	// video
	var vtag = document.createElement('video');
	vtag.setAttribute('src',neuri+'.ogg');
	vtag.setAttribute('controls','true');
	vtag.setAttribute('autoplay','true');
	var otag = document.createElement('object');
	otag.setAttribute('type','application/x-shockwave-flash');
	otag.setAttribute('data','http://www.youtube.com/v/'+yt);
	var ptag = document.createElement('param');
	ptag.setAttribute('name','movie');
	ptag.setAttribute('value','http://www.youtube.com/v/'+yt);
	// appendage
	otag.appendChild(ptag);
	vtag.appendChild(otag);
	tcl.appendChild(vtag);
	tcl.appendChild(cbut);
	trw.appendChild(tcl);
	tbd.appendChild(trw);
	tbl.appendChild(tbd);
	document.body.appendChild(tbl);
		return false;
	}