var symbol_array = new Array();
symbol_array["BS"] = 8;
symbol_array["CR"] = symbol_array["ENTER"] = 13;
symbol_array["SHIFT"] = 16;
symbol_array["CTRL"] = 17;
symbol_array["TAB"] = 18;
symbol_array["ESC"] = 27;
symbol_array["SP"] = 32;
symbol_array["A"] = 65;
symbol_array["B"] = 66;
symbol_array["C"] = 67;
symbol_array["D"] = 68;
symbol_array["E"] = 69;
symbol_array["F"] = 70;
symbol_array["G"] = 71;
symbol_array["H"] = 72;
symbol_array["I"] = 73;
symbol_array["J"] = 74;
symbol_array["K"] = 75;
symbol_array["L"] = 76;
symbol_array["M"] = 77;
symbol_array["N"] = 78;
symbol_array["O"] = 79;
symbol_array["P"] = 80;
symbol_array["Q"] = 81;
symbol_array["R"] = 82;
symbol_array["S"] = 83;
symbol_array["T"] = 84;
symbol_array["U"] = 85;
symbol_array["V"] = 86;
symbol_array["W"] = 87;
symbol_array["X"] = 88;
symbol_array["Y"] = 89;
symbol_array["Z"] = 90;
symbol_array["DEL"] = 127;