struts頁面用javascript來實現使按鈕的變灰

Html代碼 ?

1. < html:form ? action = "12.do" ? method = "post" > ??
2. < html:button ? property = "bb" ? onclick = "test();" > 退出 </ html:button > ??
3. </ html:form > ??
4. ??
5. < script ? language = "javascript" ? type = "text/javascript" > ??
6. function?test() ??
7. {??? ??
8. ?document.forms[0] .bb.disabled ???=??? true ???;??? ??
9. } ??
10. </ script > ??

    <html:form action="12.do" method="post">
<html:button property="bb" onclick="test();">退出</html:button>
</html:form>

<script language="javascript" type="text/javascript">
function test()
{   
 document.forms[0].bb.disabled   =   true   ;   
}
</script>


  

?按下這個按鈕，他自己就變成灰色且不可點的了

struts通過javascript使按鈕變灰為不可用，灰色按鈕