js 去掉重复字符串的方法

<script type="text/javascript">
    var str ="1,2,3,1,2,3";
    var arr = [];
    str = str.replace(/([^,]*)/g, function($0, $1, i){
        if(str.indexof($1) == i) arr[arr.length] =  $1;
    });
    document.write(arr.join(','));
</script>

var str="36,35,26,41,42,36,36,35,41,25,26,";var ret = [];var re = str.split(',');str.replace(/[^,]+/g, function($0, $1) {    (str.indexof($0) == $1) && ret.push($0)})alert(ret)