Function ????

Please help with the following code.

function getdata1(sXSEL)
if zXSEL=True then
zXSEL=False
else
zXSEL=True
end if
end function

<td width="20%">COMPUTER BROWSER</td>
<td width="6%"><select name="COMP_BROWSER" size="1">
<option selected value="<%=COMP_BROWSER%>"><%=COMP_BROWSER%></option>

<option> <%=getdata1(COMP_BROWSER)%></option>

I need the <option> <%=getdata1(COMP_BROWSER)%></option> to return the value. Am I missing something?

Thank....