JS: When a secret code is typed, do something!

gistfile1

	var currentPos = 0;
	var code = "angel";
	var codeLength = code.length;
	var proceed = false;
	var lastKeysPressed = new Array(codeLength);

	$(document).keyup(function(e) {
		lastKeysPressed[currentPos%codeLength] = String.fromCharCode(e.keyCode).toLowerCase();
		currentPos++;
		
		if (checkCode()) { //last check
			proceed = confirm("Congratulations! You typed the code.\n(The coooo-o-o-ooo-ooo-ooo-o-o-ooo...ooo-o-o-ooo-ooo-oooooode)\n\nDo you wish to proceed into a land with laws dictated only by the sometimes scary but always unique ramblings of Emilys' minds?\n\nThis is your last chance to turn back.\n\n");
		}
		if (proceed) {
			proceed = false;
			alert("Credit for the following page goes to Emily Block");
			$.mobile.showPageLoadingMsg();
			document.location.href = 'eb/home.html';
		}
		
		function checkCode () {
			for (var i=0; i < lastKeysPressed.length; i++) { //run through each key pressed
				for (var j=0; j < lastKeysPressed.length; j++) { //try to line up the first letter
					if (lastKeysPressed[j] === code[(j+i)%codeLength]) { //if this is true, at least the first letter is aligned (j+i)
						for (var k=0, doesThisPass=true; k < lastKeysPressed.length; k++) { //now that we're aligned, run through each letter and check it
							if (lastKeysPressed[k%codeLength] !== code[(k+i)%codeLength]) { //if it doesn't match, abort
								doesThisPass = false;
								continue;
							}
						}
						if (doesThisPass) { //if we didn't fail any tests, the code was typed successfully.
							return true;
						}
					}
				}
			}
		}
	});