var numbanners = 7 ;
var numazar = Math.random() ;
var rand1 = Math.round( (numbanners-1) * numazar) + 1 ;
banner = new Array
banner[1] = "<a href='http://www.comaco.com.mx/concurso/index.html' target='_self'><img src='../banners468/concurso_big.gif' width='468' height='60' border='0'></a>"
banner[2] = "<a href='http://www.comaco.com.mx/contacto/publicidad.html' target='_self'><img src='../banners468/banner_02.gif' width='468' height='60' border='0'></a>"
banner[3] = "<a href='http://www.comaco.com.mx/concurso/index.html' target='_self'><img src='../banners468/concurso_big.gif' width='468' height='60' border='0'></a>"
banner[4] = "<a href='http://www.comaco.com.mx/contacto/publicidad.html' target='_self'><img src='../banners468/banner_04.gif' width='468' height='60' border='0'></a>"
banner[5] = "<a href='http://www.comaco.com.mx/concurso/index.html' target='_self'><img src='../banners468/concurso_big.gif' width='468' height='60' border='0'></a>"
banner[6] = "<a href='http://www.comaco.com.mx/contacto/publicidad.html' target='_self'><img src='../banners468/banner_06.gif' width='468' height='60' border='0'></a>"
banner[7] = "<a href='http://www.comaco.com.mx/concurso/index.html' target='_self'><img src='../banners468/concurso_big.gif' width='468' height='60' border='0'></a>"
var elbanner = banner[rand1]