booksarr=new Array('0471375454','1402026366','0792380274','0878300511','013145661X','0792357310','0471694665','0131429388','0130313580','0131828274','0201773449','0321267516','0735617880','0764558234','0764573268','076457549X','073562044X','0764578146','047139470X','0764517937','1428808264','1931490430','078214151X','0761527478','0789727560','0890069131','0071360654','0735622701','0789735172','0764577042','0470045906','0596528272','0735622655','1582050503','1931490945','0954171101','1883884233','0596007485','0735614903','0192862073','006251587X','0072517158','0596527349','0789736268','0131450913','0262182149','0471444588','0814471749','0978915909','1576751929','1578516803','1882114981','0130476773','0596001088','0596004478','0596003838','');

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>')}

}