Need to restrict numeric entry to two decimal places

Hello,

I have a cfform with a cfinput of type=text. I need to restrict what can be entered into the cfinput so that it allows only two decimal places. I have tried the mask, but it won't work because "99999.99" will not allow 12.34 and "99.99" will not allow 12345.67.

I have read about validate and pattern but I've never used them. I don't know JavaScript, but I can copy and paste pretty well.

Any help you can provide is greatly appreciated.

Thank you,

Jim