booksarr=new Array('0961392126','156205810X','0961392118','0596527527','0975841963','0131345559','0321509021','032145345X','0762741783','0735710783','0735712026','0596000359','026210069X','1565922824','1560526106','0789723107','0201353679','0823004899','1581804369','0764526413','1581150784','158115240X','0471213268','0823025225','0471599018','0801855861','0801848385','0961392142','0195135326','0910965668','0201353857','1558605118','0528959921','0841620202','0596003838','0471432571','0201749602','1569761388','0471306363','0471035300','0131477498','0735617465','047166295X','0961392169','0262600358','1582345228','');

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>')}

}