<!-- Original: Ben Joffe -->
<!-- Web Site: http://www.joffe.tk/ -->
<script>
var currentspeed=1500;
var difficulty=new Array("25","10", "35")
var range=new Array("0", "25", "0")
var how;
var letters=new Array("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
function writeletters(){
if (writearea.innerHTML.substring(0, 1)=="<") writearea.innerHTML="";
var ranum=Math.round(Math.random()*difficulty[how]- -range[how])
if (currentspeed>50) currentspeed=currentspeed-10;
if (writearea.innerHTML.length<15) {writearea.innerHTML=writearea.innerHTML+letters[ranum];
setTimeout('writeletters()', currentspeed)}
else {endgame()}
}
function begingame(){
currentspeed=1500
scorearea.innerHTML="0";
how=hardness.options.selectedIndex
writeletters();
}
function keypress(butpush){
if (letters[butpush-65]==writearea.innerHTML.substring(0, 1)) {writearea.innerHTML=writearea.innerHTML.substring(1, writearea.innerHTML.length);scorearea.innerHTML=scorearea.innerHTML- -1}
var numbers2=new Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
if (numbers2[butpush-48]==writearea.innerHTML.substring(0, 1)){writearea.innerHTML=writearea.innerHTML.substring(1, writearea.innerHTML.length);scorearea.innerHTML=scorearea.innerHTML- -1}
}
var doeeee=1;
function showwait(){
if (doeeee==1){waiting.innerHTML="_";doeeee=0;}
else {waiting.innerHTML=" ";doeeee=1;}
setTimeout('showwait()', 500)
}
function endgame(){
writearea.innerHTML='<input type="button" value="Begin Game" onclick=begingame()> <select id=hardness size="1"><option>Letters</option><option>Numbers</option><option>Letters And Numbers</option></select>'
}
</script>

onKeyPress="if (event.keyCode > 96 && event.keyCode < 123) event.keyCode=event.keyCode-32; keypress(event.keyCode)" onload=focus();showwait();endgame();

<!-- Original: Ben Joffe -->
<!-- Web Site: http://www.joffe.tk/ -->
<p><span id=writearea></span><span id=waiting></span></p>
<p>Score = <span id=scorearea>0</span>

Ben Joffe

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