how to express all characters in keyboard in js reg exp
// all keys (including space and tab)
var allKeyboardKeysRegex = /^[a-zA-Z0-9~`!@#\$%\^&\*\(\)_\-\+={\[\}\]\|\\:;"'<,>\.\?\/ ]*$/;
// example tests
var nonShiftChars = "`1234567890-= qwertyuiop[]\asdfghjkl;'zxcvbnm,./ "
var shiftChars = "~!@#$%^&*()_+{}|:\"<>? ";
var someAlphaNumeric = "aAbB12 89yYzZ";
// test with allKeyboardKeysRegex
allKeyboardKeysRegex.test(nonShiftChars);
allKeyboardKeysRegex.test(shiftChars);
allKeyboardKeysRegex.test(someAlphaNumeric);