function searchvideos(tag) {
	var tagID = escape(tag);
	var headID = document.getElementsByTagName("head")[0];
	var newScript = document.createElement('script');
	newScript.type = 'text/javascript';
	newScript.src = 'http://gdata.youtube.com/feeds/api/videos?q=' + tagID + '&alt=json-in-script&max-results=4&callback=respuestav';   
	headID.appendChild(newScript);
  	document.getElementById('listavideos').innerHTML="<center>Cargando Videos...</center>"; 
	return false;  
}
function respuestav(data) {
  var feed = data.feed;
  var entries = feed.entry || [];
  var html = [''];
  var aux=0;
  var titulo;
  for (var i = 0; i < entries.length; i++) {
    var entry = entries[i];
    var title = entry.title.$t.substr(0, 33);
    titulo = title;
    title = remplasar(titulo);
    titulo=titulo.toLowerCase();
    var thumbnailUrl = entries[i].media$group.media$thumbnail[0].url;
    var playerUrl = codeyt(thumbnailUrl);
    if (aux==0){	html.push('<div style="float:left;width:300px;">');}
    html.push('<div style="width:137px;margin:5px 5px;float:left;"><a href="http://videos.sonicomusica.com/video/'+playerUrl+'/'+title+'/" target="_blank"><img style="border:solid #ff761c 1px;" width="135px" height="90px" border="0" src="'+thumbnailUrl+'"/></a><div class="titulovideo"><a href="http://videos.sonicomusica.com/video/'+playerUrl+'/'+title+'/" target="_blank">'+titulo+'</a></div></div>');
    if (aux==1){ html.push('</div><div style="float:left;width:300px;">');}
		aux++;
  }
  html.push('</div>');
  document.getElementById('listavideos').innerHTML = html.join('');
}
function codeyt(cadena){
	var arreglo = cadena.split('/');
	return(arreglo[4]);
}
function remplasar(cadena) {
	cadena=cadena.split(/[^A-Za-z0-9-]/).join("-"); 
	cadena=cadena.split("--").join("-"); 
	cadena=cadena.split("---").join("-"); 
	cadena=cadena.split("--").join("-");	
	return cadena;
}