Resolved Guessing Game Help. [Archive]

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Jamesc

12-14-2011, 08:22 PM

What I'm trying to achieve is it initialises a number between 1-2000 randomly.
When the submit button is clicked it simply returns if the number that is in putted is higher or lower than the randomly initialised number.
External JavaScript:

Html

<html>
<head>
<script type="text/javascript" src="jsscri.js"></script>
</head>
<body onload="initialisation ()">

<form name="exampleform">
<h3>
Number: <input name="number" type="text"
onchange='checkNumber( this.value );'>
</h3>
<p>
<input name="submit" type="button" value="Guess"
onclick= 'checkValue()';/>
</p>

</body>
</html>

If you load this onto a webpage you'll see what i'm trying to do. I tried deleting the rest of the code to keep the size of the code down.

mvmacd

12-14-2011, 08:34 PM

"checkNumber" is not a function. Did you leave some code out?

Also, you misspelled initialization as "initialisation" in the onload.

Old Pedant

12-14-2011, 08:41 PM

Also, the checkValue( ) function requires a single argument passed to it.

When invoked from the "Guess" button, no value is supplied.

Jamesc

12-14-2011, 08:42 PM

Sorry. I changed the spelling. Heres the check function. It checks the in-putted text and alerts the user if the number they put is outside the range of 0-2000.

function checkNumber(num)
{

if ( isNaN(num) || num < 0 || num > 2000) {
alert( num + " Number has to be between 0 - 2000");
}
}

Also, the checkValue( ) function requires a single argument passed to it.

<p>
<input name="submit" type="button" value="Guess"
onclick= 'checkValue(num)';/>
</p>

Is this right? I'm not sure if it looks at the values in the input box then checks.

Old Pedant

12-14-2011, 09:13 PM

How could num possibly be right?

Look here:

<input name="number" ...

So:

<input name="submit" type="button" value="Guess"
onclick="checkValue(this.form.number.value)" />