It looks like laboratory:laboratory actionPerformed has been defined such that it does not allow <%= %> as an attribute value.
Check the tld for the taglib if <rtexprvalue>true</rtexprvalue> for this tag then what you did should work, if <rtexprvalue>false</rtexprvalue> then it'll only take a straight string: actionPerformed="didThis" Lance > <laboratory:laboratory > actionPerformed="<%=LaboratoryTag.ADD_LABORATORY%>" > > .... > .... > </laboratory> > > and during parsing I get error: > > ---------------------- > Error parsing JSP page /webcomp/admin/add_laboratory.jsp > > <%=LaboratoryTag.ADD_LABORATORY%> is a request-time attribute (invalid > for this attribute)
