只能输入数字:

onkeyup="this.value=this.value.replace(/\D/g,'')"

?

eg :<s:textfield id="fCODE" name="formInfo.fCODE" onblur="javascript:return check_code();"></s:textfield>

?

?

?

Nobody can go back and start a new beginning, but anyone can start today and make a new ending!
没有人能回到过去重新开始，但每个人都可以从今天开始，去开创新的结局！