var max = 10;
var nrImages = 3;
function makeImages() {
this[0] = "java_img/5/feira0.jpg";
this[1] = "java_img/5/feira1.jpg";
this[2] = "java_img/5/feira2.jpg";

this.length = nrImages;
}
function makeLinks() {
this[0] = "http://www.rebal.com.br/acougue_mesa_etileno.html";
this[1] = "http://www.rebal.com.br/home_balanca.htm";
this[2] = "http://www.rebal.com.br/feira_limpa_5.htm";


this.length = nrImages;

}
var vetImages = new makeImages();
var vetLinks = new makeLinks();
var x = Math.round(Math.random()*max);
var y = max / nrImages;
for(var cont = 1;cont*y<= max;cont++) {
if (x <= (cont*y)) {
document.write("<a href="+vetLinks[cont-1]+" target=_self><img src="+vetImages[cont-1]+" border=0></a>");
break;
}
}