JS处理回车事件

if (document.addEventListener){
    document.addEventListener( "keypress" ,keyPressHandler, true );
} else {
    document.attachEvent( "onkeypress" ,keyPressHandler);
}
function keyPressHandler(evt){
    if (evt.keyCode == 13 ){
        //为按下回车时调用的方法
        SubmitLoginForm();
    }
}