TextBox validation problem....Please help

[phpmel]

Hi all,

I am have no idea at all how to do this.
I want a textbox where the first character in the box is a 'M'.The user can see this but cannot change it. Now, i want to allow them to enter 5 more number charachers in the SAME textbox after the 'M' to make up a ID. The IDs must start with 'M' so i just want the users to enter the numbers and have the "M' hard coded into the textbox always.....
Is this possible?

[Markus]

Ahhhh, interesting!

I don't know but my first thought would be to:

[code=html]
<form name="" action="">
<label for="id">Userna me:</label> m<input type="text" id="id" />
</form>
[/code]
Leave the 'm' outside the input, sort of thing.

:)