I just wondered if anyone had any ideas about adding a calculator in to a html email? Is it possible to create a calculator without javascript? I wouldn't have thought it was but I just wanted to see if anyone had any examples or had seen anything similar... ideally it would be a calculator for a loan, use would input an amount, calculator would tell them what the repayments would be each month based on an interest figure. I know about the checkbox hack and I could get the user to select a figure (click on a button/checkbox) and then show them an pre-determined outcome, but I was wondering if calculations could be done based on user input, even if it's just in a few more modern email clients.