js 删除数组中重复的数据

function delCongfu(typeArray){
    
    var str = []; 
    for(var i = 0,len = typeArray.length;i < len;i++){ 
    ! RegExp(typeArray[i],"g").test(str.join(",")) && (str.push(typeArray[i])); 
    } 
    alert(str);

}
//传入数组typeArray，生成的新数组str.