How to suppress framework generated messages

Hi Friends

I have a attribute in node which is a simple type and Built-In type is decimal.

This is binded to a input field.

When I am putting numeric values and hit enter key(this input box is associated with an event)it works fine but when I gave aplhanumeric values, it prompts me with an framework generated message.

My requirement is to suppress this message and give my own message.(NWDS version is 2004)

I am able to get my own message when the input is null, but not able to get customised message when input is alphanumeric.

Any help is highly appreciable.

Thanks & regards

Vivek K Mishra