Purpose: Finds out the class of an object.

Return Values: Returns name of object's class in form of a string.

Example:

heitml input:	resulting output:
<? class(emptytuple)>	Object
<def myownclass; inherit object; return this; /def> <? class(myownclass())>	myownclass
<? class(this)>	page
<? class(parent)>	p

Example:

heitml input: <defenv myownenv; inherit object; defbody; /defenv> <myownenv><? class(parent)></myownenv>

resulting output: myownenv