var swfFile = 'sequence' + (Math.floor((Math.random() * 3)) + 1) + '.swf';
document.write(
  '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" width="947" height="386" id="navigation">'
  +'<param name=menu value="false">'
  +'<param name=movie value="./swf/ws/' + swfFile + '">'
  +'<param name=quality value=high>'
  +'<param name="wmode" value="opaque">'
  +'<embed src="./swf/ws/' + swfFile + '" height="386" quality="high" menu="false" name="navigation" align="" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" wmode="transparent"  width="948"></embed>'
  +'</object>'
)