function updatePrefixPrefix()
{
	if(document.form.Prefix[form.Prefix.selectedIndex].value == '')
	{
		document.images.prefix_prefix_1.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.prefix_prefix_1.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form.Prefix[form.Prefix.selectedIndex].value + '.gif';
	}
}
function updateSuffixPrefix()
{
	char = isAlpha(document.form.alphas.value.toUpperCase(), 'prefix');
	if(char > 0)
	{
		alert('Please enter letters only excluding I, Q & Z');
		var newString = '';
		for(i = 0; i < char - 1; i++)
		{
			newString += document.form.alphas.value.charAt(i);
		}
		document.form.alphas.value = newString;
	}
	if(document.form.alphas.value.charAt(0) == '')
	{
		document.images.prefix_suffix_1.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.prefix_suffix_1.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form.alphas.value.charAt(0).toUpperCase() + '.gif';
	}
	if(document.form.alphas.value.charAt(1) == '')
	{
		document.images.prefix_suffix_2.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.prefix_suffix_2.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form.alphas.value.charAt(1).toUpperCase() + '.gif';
	}
	if(document.form.alphas.value.charAt(2) == '')
	{
		document.images.prefix_suffix_3.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.prefix_suffix_3.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form.alphas.value.charAt(2).toUpperCase() + '.gif';
	}
}

function updatePrefixCurrent(prefixCurrent)
{
	if(prefixCurrent != null)
	{
		if(prefixCurrent.charAt(0) == '')
		{
			document.images.current_prefix_1.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
		}
		else
		{
			document.images.current_prefix_1.src = 'http://www.make-your-own.co.uk/images/plates/' + prefixCurrent.charAt(0) + '.gif';
		}
		if(prefixCurrent.charAt(1) == '')
		{
			document.images.current_prefix_2.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
		}
		else
		{
			document.images.current_prefix_2.src = 'http://www.make-your-own.co.uk/images/plates/' + prefixCurrent.charAt(1) + '.gif';
		}
	}
}
function updateSuffixCurrent()
{
	char = isAlpha(document.form1.alphas.value.toUpperCase(), 'current');
	if(char > 0)
	{
		alert('Please enter letters only excluding I & Q');
		var newString = '';
		for(i = 0; i < char - 1; i++)
		{
			newString += document.form1.alphas.value.charAt(i);
		}
		document.form1.alphas.value = newString;
	}
	if(document.form1.alphas.value.charAt(0) == '')
	{
		document.images.current_suffix_1.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.current_suffix_1.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form1.alphas.value.charAt(0).toUpperCase() + '.gif';
	}
	if(document.form1.alphas.value.charAt(1) == '')
	{
		document.images.current_suffix_2.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.current_suffix_2.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form1.alphas.value.charAt(1).toUpperCase() + '.gif';
	}
	if(document.form1.alphas.value.charAt(2) == '')
	{
		document.images.current_suffix_3.src = 'http://www.make-your-own.co.uk/images/plates/any_letter.gif';
	}
	else
	{
		document.images.current_suffix_3.src = 'http://www.make-your-own.co.uk/images/plates/' + document.form1.alphas.value.charAt(2).toUpperCase() + '.gif';
	}
}