var max = 4;

var nrImages = 4;

function makeImages() {

this[0] = "http://i40.tinypic.com/2mocbva.gif";
this[1] = "http://i40.tinypic.com/200wl95.gif";
this[2] = "http://i44.tinypic.com/1zxr6uh.gif";
this[3] = "http://i43.tinypic.com/1zwixht.gif";




this.length = nrImages;

}



function makeLinks() {

this[0] = "http://compare.buscape.com.br/visualiza?id=6424&raiz=2&prod_id=62655096&emp_id=77&pos=4&az=abad2d62b542c56f437c1ee1e50c4890&cn=149552322&nc=18927915220091002110436&pg=4&site_origem=9637271";
this[1] = "http://compare.buscape.com.br/visualiza?id=2852&prod_id=55641168&emp_id=155&pos=1&az=8e007bbcef0b34cd887c82f6632249cd&cn=471045372&nc=1741202013020090928112624&site_origem=9637271";
this[2] = "http://compare.buscape.com.br/visualiza?id=77&prod_id=67738939&emp_id=79&pos=1&az=c8f0c63c598f549d47aee94f52d598d0&cn=1751830927&nc=1741202013020090909112832&site_origem=9637271";
this[3] = "http://compare.buscape.com.br/visualiza?id=77&prod_id=66075547&emp_id=902356&pos=1&az=f26d0b87ec75ef5a8f6d5c7cbf314e0f&cn=749360396&nc=1741202013020091015142944&site_origem=9637271";




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=_blank><img src="+vetImages[cont-1]+" border=0></a>");
break;
}
}