HOW to find my mistakes

[msNewbie]

I am VERY new in class (2 weeks - 1st year) and I have a long script to make but I am just trying to get the basics done to see how it works but it won't show up after the first page that has the button to start the program.
I really don't want the answer to my problem because that won't help me in the long run but what I want is to know HOW to find my mistakes.
I am using FireFox & can't get the debugger to work.
Is there another program that you people use that is better?

function main()  //program driver
{	//	Begin function main()

// this section tells me what the variables are

	var pennies = 0;
	var nickles = 0;
	var t       = 0;

// This section will let the user be prompted for the amount of coin.

	pennies = parseFloat(prompt("Enter how many pennies you have:", ""));
	nickles = parseFloat(prompt("Enter how many nickles you have:", ""));

	t = .01 * pennies + .05 * nickles;	//Also tried this:	t = (.01 * pennies) + (.05 * nickles);
		
// Shows total coins

	alert("Pennies: " + pennies.toFixed) + "\n" +
	      "Nickles: " + nickles.toFixed) + "\n" +
	      "Caculated amount: " + t.toFixed);
			  
}	//	End   function main()

[xelawho]

I prefer the Chrome error console, but firebug works fine for showing the errors in your code - open firebug, click on the "script" tag and refresh the page.

[Logic Ali]

The built-in error console in FireFox is displayed by pressing CTRL+Shift+J.
Click the Clear button, reload your document then check the console for error messages.

BTW in JavaScript even if your function is called 'main', it still has to be called.

[msNewbie]

Originally Posted by Logic Ali

The built-in error console in FireFox is displayed by pressing CTRL+Shift+J.
Click the Clear button, reload your document then check the console for error messages.

BTW in JavaScript even if your function is called 'main', it still has to be called.

I got the code to work after you told me about CTRL + Shift+J and found a simple mistake.
Then I added the rest of the code but I come up with this as being wrong:

	if(.01 || <1.00)

It doesn't like 1.00 or 1.0 or 1
What I am trying to say is If it is 1¢ or less than $1.00