gwt and zk and dojo

i have view the 2 ajax framework.
have to say, find some problem avoid me to use them freely.
gwt,
i use gwt with jsp. gwt can get value from hidden form element generated
by jsp. but i found the cross browser compacity is not as good as gmail(seem to be poor).
also the wigets is not as rich as ZK's. so i believe the gmail is not made by gwt
and gwt maybe is 10% functional of gmail's develop kit.
zk,
it use jsp tag and servlet filter to work with jsp. but the web.xml is for tomcat,
fail on resin. it's maybe a small problem. however, the page should be designed
not very similar with jsp, that is a discount for me.
after trying to use then for one day, failed, i found i'd better do ajax use my
own hand-craft kits.

PS. i found dojo, it is a clear kit just use javascript. it is usable.
有人问我编程是不是从网上下载工具,然后开发. 我说是的.
是的,OS不是我开发的,语言不是我开发的,IDE不是我开发的. 我只是2次开发.
虽然长期以来都有1次开发的感觉.
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