var screenshot = 1;
var numScreenshots = 5;
var screenDescription1 = "Practice words to master them";
var screenDescription2 = "List and edit your words and their audio";
var screenDescription3 = "Take a Quiz to test your knowledge";
var screenDescription4 = "Look up and add new words from the Dictionary";
var screenDescription5 = "Edit your words- including difficulty, audio, and groups";

function showPrev() {
	screenshot--;
	if (screenshot < 1)
		screenshot = numScreenshots;
	document.getElementById("screenshot").src = "http://likethought.com/touch/lexicon/images/screenshots/" + screenshot + ".png";
	document.getElementById("description").innerHTML = eval("screenDescription" + screenshot);
}

function showNext() {
	screenshot++;
	if (screenshot > numScreenshots)
		screenshot = 1;
	document.getElementById("screenshot").src = "http://likethought.com/touch/lexicon/images/screenshots/" + screenshot + ".png";
	document.getElementById("description").innerHTML = eval("screenDescription" + screenshot);
}