js 去除数组重复项

Array.prototype.delRpt=function(a)
{
    return ("\x0f"+ this.sort().join("\x0f\x0f") +"\x0f").replace(/(\x0f[^\x0f]+\x0f)\1+/g,'$1').split("\x0f\x0f");
}

var ary = new Array("aaa","gg g","aaa","isaldk","gg g",'g gg','isaldk','i s a l d k','111','111');
var ary2 = new Array("空间","空 间"," 空间 ","111","111","百科","百科","百   科");
console.log(ary.delRpt());
console.log(ary2.delRpt());