function insertaFlash(archivoSinSwf, ancho, alto, params) {
  var cadena = archivoSinSwf + ".swf" + params;
  document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="' + ancho + '" height="' + alto + '" id="' + archivoSinSwf + '" align="middle">');
  document.write('<param name="allowScriptAccess" value="sameDomain" />');
  document.write('<param name="movie" value="' + cadena + '" /><param name="quality" value="best" /><param name="wmode" value="transparent" /><embed src="' + cadena + '" quality="best" wmode="transparent" width="' + ancho + '" height="' + alto + '" name="' + archivoSinSwf + '" swLiveConnect="true" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
  document.write('</object>');
}

function insertaFondo(archivoSinSwf, ancho, alto, params) {
  var anchura = screen.width;
  var desviacionLeft = anchura / 2 - ancho / 2;
  var cadena = archivoSinSwf + ".swf" + params;
  document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="' + ancho + '" height="' + alto + '" id="' + archivoSinSwf + '" align="middle">');
  document.write('<param name="allowScriptAccess" value="sameDomain" />');
  document.write('<param name="movie" value="' + cadena + '" /><param name="quality" value="best" /><param name="wmode" value="transparent" /><embed src="' + cadena + '" quality="best" wmode="transparent" width="' + ancho + '" height="' + alto + '" name="' + archivoSinSwf + '" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
  document.write('</object>');
  document.getElementById("flashMask").style.left = desviacionLeft+"px";
}