var prefix_array=new Array(1, 2, 5, 6, 7, 8, 9, 20, 27, 30, 31, 32, 33, 34, 36, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 61, 62, 63, 64, 65, 66, 81, 82, 84, 86, 90, 91, 92, 93, 94, 95, 98, 212, 213, 216, 218, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 290, 291, 297, 298, 299, 350, 350, 351, 352, 353, 354, 355, 356, 357, 358, 370, 371, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 385, 386, 387, 389, 420, 421, 423, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 590, 591, 592, 593, 594, 596, 597, 598, 599, 850, 852, 853, 855, 856, 880, 886, 960, 961, 962, 963, 964, 965, 966, 967, 968, 970, 971, 972, 973, 974, 975, 976, 977, 992, 993, 994, 995, 998, 3906, 0);
	var ccc;
                alert(prefix_array); //ORGINALL prefix_array
	        ccc= prefix_array.slice(0,2);
                alert(prefix_array); //Still Nothing :(
		alert(ccc); //RESULT 1,2