charCode and keyCode Properties
function showCode(which, evt) {
document.forms[0].elements[which + "Char"].value = evt.charCode
document.forms[0].elements[which + "Key"].value = evt.keyCode
}
function clearEm() {
for (var i = 1; i < document.forms[0].elements.length; i++) {
document.forms[0].elements[i].value = ""
}
}
charCode and keyCode Properties