window.event.keyCode is compatible with IE and Firefox to implement js code_javascript skills

HTML code

Copy code The code is as follows:

Javascript code

Copy code The code is as follows:

function keyNumAll(evt){
//Compatible with IE and Firefox to obtain the keyBoardEvent object
evt = (evt) ? evt : ((window.event) ? window.event : "" );
var key = evt.keyCode?evt.keyCode:evt.which;//Compatible with IE and Firefox to obtain the key value of the keyBoardEvent object
console.info(key);//Display the key value
}
}