function InsertarFlash(param) {

  if (param == undefined) {

    document.write("<object id='flash_fondo'")+
    document.write("        classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000'")+
    document.write("        codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0'")+
    document.write("        width='2500'")+
    document.write("        height='2500'>")+
    document.write("        <param name='movie' value='swf/fondo.swf'>")+
    document.write("        <param name='menu' value='false'>")+
    document.write("        <param name='quality' value='high'>")+
    document.write("        <param name='wmode' value='transparent'>")+
    document.write("        <param name='flashvars' value='&Width=" + document.body.clientWidth + "&Height=" + document.body.clientHeight + "'>");
    document.write("        <embed src='swf/fondo.swf'")+
    document.write("               menu='false'")+
    document.write("               quality='high'")+
    document.write("               wmode='transparent'")+
    document.write("               width='2500'")+
    document.write("               height='2500'")+
    document.write("               flashvars='&Width=" + document.body.clientWidth + "&Height=" + document.body.clientHeight + "'")+
    document.write("               type='application/x-shockwave-flash'") +
    document.write("               pluginspage='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'>")+
    document.write("        </embed>")+
    document.write("</object>");

  } else {

    document.write("<object id='index'")+
    document.write("        style='left:" + (document.body.clientWidth-800)/2 + "px;top:" + (document.body.clientHeight-500)/2 + "px;position:absolute;'")+
    document.write("        classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000'")+
    document.write("        codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0'")+
    document.write("        width='800'")+
    document.write("        height='500'>")+
    document.write("        <param name='movie' value='swf/index.swf'>")+
    document.write("        <param name='menu' value='false'>")+
    document.write("        <param name='quality' value='high'>")+
    document.write("        <param name='wmode' value='transparent'>")+
    document.write("        <param name='flashvars' value='&Width=" + document.body.clientWidth + "&Height=" + document.body.clientHeight + "'>");
    document.write("        <embed src='swf/index.swf'")+
    document.write("               menu='false'")+
    document.write("               quality='high'")+
    document.write("               wmode='transparent'")+
    document.write("               width='800'")+
    document.write("               height='500'")+
    document.write("               flashvars='&Width=" + document.body.clientWidth + "&Height=" + document.body.clientHeight + "'")+
    document.write("               type='application/x-shockwave-flash'") +
    document.write("               pluginspage='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'>")+
    document.write("        </embed>")+
    document.write("</object>");

  }

}