<body>
<c:if test="${n1=='1'}">
<script language=jscript>
alert("");
document.getElementsByName("nn1").style.display="block";
</script>
</c:if>
<td>
<div id="nn1" style="display:none"><a href="javaScript:show11()"><img src="<%=request.getContextPath()%>/OrgManager/images/l-dwsz.gif" width="177" height="25" border="0" /></a></div>
</td>
</body>
<c:if test="${n1=='1'}">
<script language=jscript>
alert("");
document.getElementsByName("nn1").style.display="block";
</script>
</c:if>
<td>
<div id="nn1" style="display:none"><a href="javaScript:show11()"><img src="<%=request.getContextPath()%>/OrgManager/images/l-dwsz.gif" width="177" height="25" border="0" /></a></div>
</td>
</body>
如果按id应该是document.getElementById("nn1")
改成
getElementById
<body>
<c:if test="${n1=='1'}">
<script language=jscript>
function $(id)
{
return document.getElementById(id);
}
alert("");
$('nn1').style.display="block";
</script>
</c:if>
<td>
<div id="nn1" style="display:none"> <a href="javaScript:show11()"> <img src=" <%=request.getContextPath()%>/OrgManager/images/l-dwsz.gif" width="177" height="25" border="0" /> </a> </div>
</td>
</body>