<script type=text/javascript>
var iRandom;
function Restart()
{
iRandom = Math.floor(Math.random()*10)+1;
alert('OK, I am thinking of a number between 1 and 10');
}
function Guess()
{
var yourGuess = document.getElementById('myGuess').value;
if (yourGuess>iRandom)
alert('Too High.');
if (yourGuess<iRandom)
alert('Too Low.');
if (yourGuess==iRandom)
{
alert('Well done! You guessed it.');
Restart();
}
}
</script>
<div>Enter your guess between 1 and 10: <input type=text id='myGuess' name='myGuess'>
<input type='button' onClick='Guess()' value='Guess'>
<br>

<br>
<input type='button' onClick='Restart()' value='Start Again'>
<script type=text/javascript>
Restart();
</script>