function checkVolara(i) {
	var f = i.form;
	var th = f.thickness.value;
	var cl = f.color.value;
	if ((cl == 'charcoal') && (th != '0.25')) {
		alert ('Charcoal Volara can only be ordered online in the 0.25" inch thickness.\n\nPlease contact us to order the charcoal color in a ' + th + '" thickness.');
		f.color.selectedIndex = 0;
	}
}