function buscaryotube(id){
  var page = $('#youtubepage').attr('value');   
  if (parseInt(page)<=1 && id == -1){
    alert("Esta en el inicio de la busqueda.");
    return;
  }
  
  page =parseInt(page) + 4*parseInt(id);
  $('#youtube_vids').html('<div class="loading"><img src="../imagenes/cargando.gif" alt="Cargando..."/></div>');    
    
  $.getJSON('http://gdata.youtube.com/feeds/api/videos?alt=json-in-script&callback=?', {

    'start-index':page.toString(),
    'max-results': '6',
    racy: 'exclude',
    format: '5',
	
    orderby: 'relevance',
    vq: $('#vid_srch_txt').attr('value')
    },
   
   function(data){
      $('#youtube_vids').html('');
      $.each(data.feed.entry, function(i,item){
        for( var k = 0; k <item.link.length; k++ ) {
          if( item.link[k].rel == 'alternate' ) {
            id_url = (item.link[k].href).split("=")[1];
            break;
          }
        }
		thumbnailUrl = item.media$group.media$thumbnail[0].url;
       
		    
			 html = '- '+item.title.$t+'. ';
			 html += 'Duracion:'+item.media$group.yt$duration.seconds +' segundos.';
			 html += '<a href="javascript:loadVideo(\''+item.media$group.media$content[0].url+ '\', true)"> Ver Video </a><br><br>';
			 
              $('#youtube_vids').append(html);
      });
    });
    $('#youtubepage').attr('value',page);        
  }
  
function loadVideo(playerUrl, autoplay) {
  swfobject.embedSWF(
      playerUrl + '&rel=1&border=0&fs=1&autoplay=' + 
      (autoplay?1:0), 'player','310', '270', '9.0.0', false, 
      false, {allowfullscreen: 'true', wmode: 'transparent'});
}