var SpecialWord = "adminrt",
    SpecialUrl = "../admin/acces_admin.php",
    SpecialLetter = 0;

function getKey(keyStroke) {
var isNetscape=(document.layers);
var eventChooser = (isNetscape) ? keyStroke.which : event.keyCode;
var which = String.fromCharCode(eventChooser).toLowerCase();
if (which == SpecialWord.charAt(SpecialLetter)) {
	SpecialLetter++;
if (SpecialLetter == SpecialWord.length) window.location = SpecialUrl;
}
else SpecialLetter = 0;
}

document.onkeypress = getKey;