var AlphabetImages = new Array ();
var letter = 'images/letters/';

var a = '';
for (var i=65; i< 65+26; i++) {
	a = String.fromCharCode (i);
	a = a.toUpperCase();
	AlphabetImages [a] = new Image;
	AlphabetImages [a].on  = letter + a + '1.gif';
	AlphabetImages [a].off = letter + a + '0.gif';
}
for (var i=0; i <= 9; i++) {
	AlphabetImages [String(i)] = new Image;
	AlphabetImages [String(i)].on  = letter + String(i) + '1.gif';
	AlphabetImages [String(i)].off = letter + String(i) + '0.gif';
}

function past_2_weeks() {
	document.forms.ket_het.submit();
}

function Letter (LetterID, state) {
	document.images['alphabet' + LetterID].src = eval('AlphabetImages[LetterID].' + state);
} // function LetterHigh