function utf8_decode ( str_data ) {
				var tmp_arr = [], i = 0, ac = 0, c1 = 0, c2 = 0, c3 = 0;
				
				str_data += '';
				
				while ( i < str_data.length ) {
					c1 = str_data.charCodeAt(i);
					if (c1 < 128) {
						tmp_arr[ac++] = String.fromCharCode(c1);
						i++;
					} else if ((c1 > 191) && (c1 < 224)) {
						c2 = str_data.charCodeAt(i+1);
						tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
						i += 2;
					} else {
						c2 = str_data.charCodeAt(i+1);
						c3 = str_data.charCodeAt(i+2);
						tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
						i += 3;
					}
				}
				return tmp_arr.join('');
			}