// JavaScript Document
ranNum = 1 + Math.floor(Math.random()*2);

document.write("<object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0' width='775' height='135'>");
document.write("  <param name='movie' value='cabecera"+ranNum+".swf'>");
document.write("  <param name='quality' value='high'>");
document.write("  <embed src='cabecera"+ranNum+".swf' quality='high' pluginspage='http://www.macromedia.com/go/getflashplayer' type='application/x-shockwave-flash' width='775' height='135'></embed>");
document.write("</object>");