<script language="javascript">
   function getNoRepeat() {
       return arguments[0].join('‖').match(/(\b[^‖]+\b)(?!.*‖\1\b)/ig);
   }
   var tmpArr = [1, 'a', 'ab', 'abc', 'd', 1.2, 'a+b', 'd', 'e', 5, 'a', 1, 'h', 'c', 'ab'];
   var retArr = getNoRepeat(tmpArr);
   alert(retArr);
</script>



<script>
alert("1,11,1.11,1111,111,11,1,1.11".match(/(\b\d+(?:\.\d+)?\b)(?!.*,\1\b)/g))
</script>



<script>
alert("123450,0,1,2,5,3,2,12,4,1,1,123450".match(/(\b\d+\b)(?!.*,\1(,|$))/ig))
</script>




<script>
alert("123450,0,1,2,5,3,2,12,4,1,1,123450".match(/(\b\d+\b)(?!(?:,[^,]+)*,\1(?:,|$))/ig))
</script>




<script>
var s = "0,1,2,5,3,2,12,4,1,1,123450";
var sTmp = (","+s.split(",").reverse().join(",")+",").replace(/,([^,]+)(?=,.*,\1,)/ig, '').split(",").reverse().join();
sTmp = sTmp.substr(1, sTmp.length-2);
alert(sTmp)
</script>




<script>
var strArr = "123450,0,1,2,5,3,2,12,4,1,1,123450".split(",")
var str = ","
for(i = 0; i < strArr.length; i++)
{
  if(str.indexOf("," + strArr[i] + ",") == -1)str += strArr[i] + ","
}
alert(str.substring(1,str.length - 1))
</script>