<script language='JavaScript'>

function random_number(){
 var no = parseInt(Math.random() * 50);
 if( no < 1 || no > 45) return random_number();
 else return no;
}

function pick_number(){
 var no = new Array();
 var str = "";
 var tmp_num, i=0;
 while(no.length < 6){
  tmp_num = random_number();
  for(i=0;i<no.length; i++){ if(no[i] == tmp_num) break; }
  if(i == no.length){
   no[i] = tmp_num;
   str += tmp_num + ",";
  }
 }
str = str.substring(0,(str.length-1));
 return str;
}

alert (pick_number());

</script>
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