Boy oh boy, how many times do you have to say it? (Don't take this personally 3rdvalve... this is asked often.)
Get into the habit of good coding practices by quoting your attributes. No quotes surrounding attribute values is not only poor coding, but it is also non-compliant with W3C's standards for HTML/XHTML.
It is funny though, that you have quotes on the other attributes, but not the value attribute...