[wawandas]

var arr = [1,2,3,4,1,2,6,7];

var tmp_arr = new Array();

	for (i = 0; i < arr.length; i++) 
    {
		if (tmp_arr.indexOf(arr[i]) == "-1") 
        {
			tmp_arr.push(arr[i]);
		}
	}
      

alert(tmp_arr);