<html oncontextmenu="return false;">
    <head>
        <meta charset="utf-8"/>
        <style>
            html, body {
                width: 100%;
                height: 100%;
                margin: 0px;
                padding: 0px;
                overflow: hidden;
            }
            #keyhandler {
                height: 1px;
                opacity: 0.01;
                overflow: hidden;
                outline: none;
                border: none;
                position: absolute;
        