$(document).ready(function() {
    var adiframe = document.getElementsByTagName("iframe");
    if (adiframe) {
        for (var i = 0; i < adiframe.length; i++) {
            switch (adiframe[i].id.toLowerCase()) {
                case 'bannerad':
                    adiframe[i].src = '/_resources/adverts/advert_NZ_banner.htm'
                    break;
                case 'mpu':
                    adiframe[i].src = '/_resources/adverts/advert_NZ_mpu.htm'
                    break;
                case 'sky':
                    adiframe[i].src = '/_resources/adverts/advert_NZ_sky.htm'
                    break;
                case 'bottomad':
                    adiframe[i].src = '/_resources/adverts/advert_NZ_banner.htm';
                    break;
            }
        }
    }
});
function showbanner() { };
function showmpu() { };
function showsky() { };
function showbottomad() { };