使用CSS style来实现该功能.例如,你有如下的代码来显示消息:
<div align="center">
<h:messages id="errMsgs" styleClass="errorFeedback" layout="table" />
</div>
errorFeedback style class 可能是下面的代码:
.errorFeedback {
color: black;
vertical-align: middle;
background-image: url(/AccountSetup/images/warning_feedback.gif);
background-repeat: no-repeat;
background-position: left top;
font-family: Verdana, Arial, Helvetica, sans-serif;
font-weight: bold;
line-height: 18px;
font-size: 10pt;
text-align: left;
text-indent: 22px;}