Guessing Game
This script randomly chooses a number between one and a hundred. The player guesses at the number and is given hints.

I am thinking of a number from 1 to 100. Can you guess what it is?

Your Guess: 
#-Guesses: 
     INFO:


Discussion

 A player can guess or give up by tapping on the two buttons to the right of the guess box. These buttons use the onClick event to check to call the guess and give-up functions.

The script sets the focus to the input field when the page loads by including 

    onLoad="document.forms[0].guess.focus()"
in the initial body tag. This means that the game can be played right away without clicking on the "guess" text input field.

Note: Because a player might enter text rather than a number, guess updates the guess box to a parseInt() function call. If a player typed an invalid text string, rather than a number, the guess box shows "NaN". Netscape treats this nonnumber as a zero, more or less. (Netscape Navigator version 3.0 will permit scripts to test for "NaN".) 

    var num = parseInt(thisform.guess.value)
    thisform.guess.value = num
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