<! DOCTYPE HTML>
<HTML>
<head>
<Meta charset = "UTF-. 8">
<title> </ title>
<Script type = "text / JavaScript">
the window.onload = function () {
/ * keyboard events
* onkeydown button is pressed, the press has been continuously triggers
* onkeyup
* - usually bind keyboard events to get to be the focal point of the object or the Document
* /
// 1.
document.onkeydown = function (event) {
// keyCode to for the key code, to determine whether that key is pressed
// there altKey shiftKry altKey the like determines whether the pressed
// Console.log ( "press button");
IF (event.keyCode == 89 ) {
the console.log ( "Y button pressed" );
}
IF (event.altKey && event.keyCode == 89 ) {
the console.log ( "Alt key while pressing the + Y a " );
}
}
// document.onkeyup = function () {
// the console.log (" key release ");
// }
// 2.
var INPUT = document.getElementsByTagName (" INPUT ") [0 ] ;
the INPUT.onkeydown=function(){
//the console.log ( "input pressed");
// can not be used to limit the input of the input digital
IF (event.keyCode> = 48 && event.keyCode <= 57 is) { // numbers 1-9 corresponding to 48-57
/ / cancel the default behavior of input of the input something not show
return to false ;
}
}
}
</ Script>
</ head>
<body>
<form Action = "" Method = "POST">
<input type = "" value = " "/>
</ form>
</ body>
</ HTML>