How to eliminate duplicates from an array using function

This is a Function which takes one parameter (Array with duplicates) and returns another array without duplicates.


//-----------------remove duplicates--------------
function removedup(Array_duplicates){
    Array_duplicates= Array_duplicates.sort();
    var Array_nonDuplicates = new Array();
    var prev = '';
    var n = 0;
    for(var g=0; g<Array_duplicates.length; g++){
            var pres = Array_duplicates[g];
            if(pres != prev){
                    Array_nonDuplicates [n] = pres;
                    prev = pres;
                    n++;
            }
    }
    return Array_nonDuplicates ;
}


Explanation:

Here 'removedup' function takes 'Array_duplicates' array as input which consists duplicate values and returns 'Array_nonDuplicates ' array which have no duplicate values.