booksarr=new Array('096610322X','0971483841','0823079481','1934215007','0634006444','0971483809','0955006112','0879308303','0876390599','1578202299','0876390440','1590595548','0471748986','0764597787','0789735741','0470043520','0596100663','0879307072','0240516354','0240805593','059534965X','1858289610','0240808509','0240807545','0471242179','0240805984','0764536508','063403586X','0970677359','091837118X','0764507052','056608709X','1598630237','0240519612','0872886859','0240805453','0240806255','0071360972','0823077292','1858280605','0790613174','0764575643','');

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>')}

}