function InsertarFlash(nombre,ancho,alto,color_fondo) {
  document.write("<object ");
  document.write(" codebase='http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.");
  document.write("cab#version=8,0,0,0'width='"+ancho+"' height='"+alto+"' id='"+nombre+"' align='middle'>");
  document.write("<param name='allowScriptAccess' value='sameDomain' />");
  document.write("<param name='movie' value='"+nombre+".swf' /><param name='quality' value='high' /><PARAM NAME='wmode' VALUE='transparent'/>");
  document.write("<param name='bgcolor' value='"+color_fondo+"' /><embed src='"+nombre+".swf' quality='high' wmode='transparent'");
  document.write(" bgcolor='"+color_fondo+"'width='"+ancho+"' height='"+alto+"' name='"+nombre+"' align='middle' ");
  document.write("allowScriptAccess='sameDomain' type='application/x-shockwave-flash' ");
  document.write("pluginspage='http://www.macromedia.com/go/getflashplayer' /></object>");
};
//                   (nombre , ancho , alto , color_fondo)
InsertarFlash("img/movie_intro","550","320","#666666");