String value = _valueExpr.evalString(env);
Tag parent = getParent();
for (; parent != null; parent = parent.getParent()) {
if (parent instanceof NameValueTag) {
NameValueTag tag = (NameValueTag) parent;
if (value == null)
tag.addParam(name, "");
else
tag.addParam(name, value);
return SKIP_BODY;
}
}