booksarr=new Array('0385267746','0735623872','0131875108','0071472894','160008009X','0072263393','0961392118','1886284253','0130464139','0971344094','007136997X','082644833X','0898159113','B000066SA5','B00007143V','B00009EHJR','0321202988','0321228537','0787956694','0764568817','0072229721','0764539728','0789729571','0814472311','0782142915','0596006454','B0000C6IUK','0970672705','0735711704','0793145171','1555420516','059600110X','0471085863','024051694X','0735619921','0764543598','0596102453','0782143482','0471767743','0764535781','0240808312','0787981699','1412927668','1419596063','0471971774','0470037881','0321357523','1566040140','0735620520','0538716150','0596100345','1555919189','0787976148','1419505017','0766020800','0071461094','0324313306','0735614369','0787969788','0446695548','0131106538','1903450640','0471294098','1592860737','0973066261','0130990027','0735622957','0787975850','1929774443','0974080160','');

if(booksarr.length > 6){
function getRndImg() {
  var rnd = Math.round(Math.random()*(booksarr.length-1));
  return booksarr[rnd]
}
function makeArray() {
  var list = "";
  var arr = new Array();
  cnt = 0;
  while (cnt!=nofRandom) {
    var img = getRndImg();
    if (list.indexOf(img)==-1) {
      arr[cnt++]=img
      list+=img;
    }
  }
  return arr;
}
nofRandom = 6;


arr = makeArray();
for (i=0;i<arr.length;i++)
    {document.write('<iframe src="http://rcm.amazon.com/e/cm?t=masternewmedi&o=1&p=8&l=as1&asins=' + arr[i]+ '&fc1=000000&IS2=1&lt1=_blank&lc1=0000FF&bc1=000000&bg1=FFFFFF&f=ifr" style="width:120px;height:240px;" scrolling="no" marginwidth="0" marginheight="0" frameborder="0"></iframe><br><br>')}

}