Note:
The allowRichText property only relays styling information to the application interface. The setting of this property in no way restricts a user from inputting plain text markup that includes styling information. For example, regardless of the setting of this property, a user could type:
<b>hello</b>
Reference_Syntax.allowRichText = “0 | 1″
0 (default)
Text styling is invalid. This is the default when the textEdit object does not contain an exData object.
1
Text styling is valid. This is the default when the textEdit object does contain an exData object.
Form Model

allowRichText