function handle_keys(wleft, wright, wenter) {	
    if (document.getElementById) {
        document.onkeydown = whatsup;
        url_left = wleft;
        url_right = wright;
        url_enter = wright;
    }
}

function whatsup(event) {
    var code;
    if(!event) var event = window.event;

    if (event.keyCode) code = event.keyCode; else if (event.which) code = event.which;

    if ((code == 37) && (event.ctrlKey == true)) {
	if (url_left != '') {
  	    location.href = url_left;
	}
    }

    if ((code == 39) && (event.ctrlKey == true)) {
	if (url_right != '') {
	    location.href = url_right;
	}
    }

    if (code == 13) {
	if(url_enter != '') {
	    location.href = url_enter;
	}
    }
}