var imm = new Array();
imm[0] = "banner/frame1.jpg";
imm[1] = "banner/frame2.jpg";
imm[2] = "banner/frame3.jpg";
imm[3] = "banner/frame4.jpg";
imm[4] = "banner/frame4.jpg";

var lnk = new Array();
lnk[0] = "http://www.radiobutterfly.it/";
lnk[1] = "http://www.radiobutterfly.it/radio/yourbutterfly.html";
lnk[2] = "http://www.radiobutterfly.it/magazine/divetare_giornalista.html";
lnk[3] = "http://www.radiobutterfly.it/radio/radio.html";
lnk[4] = "http://www.radiobutterfly.it/";

var x = 0;

var mostra = document.getElementById("banner");

function mostra_banner()
{
    mostra.innerHTML = "<a href='" + lnk[x]  + "'><img src='" + imm[x] + "'></a>";
    window.setTimeout("mostra_banner()", 4000);
    imm.length - 1 == x ? x = 0 : x++;
}