A list box is scrollable if you specify the rows property or the height property, and there is no enough to show all list items.
<listbox width="250px" rows="4"> <listhead> <listheader label="Name" sort="auto"/> <listheader label="Gender" sort="auto"/> </listhead> <listitem> <listcell label="Mary"/> <listcell label="FEMALE"/> </listitem> <listitem> <listcell label="John"/> <listcell label="MALE"/> </listitem> <listitem> <listcell label="Jane"/> <listcell label="FEMALE"/> </listitem> <listitem> <listcell label="Henry"/> <listcell label="MALE"/> </listitem> <listitem> <listcell label="Michelle"/> <listcell label="FEMALE"/> </listitem> </listbox>