JSTLc:if不起作用

[qq_29912005]

<li>
<c:if test="${mark==0}">
1111111111
<c:if test="${imgUrl!=null}">
<div class="imgFl"><img src="${imgUrl}" alt="" /></div>
</c:if>
<c:if test="${imgUrl==null}">
<div class="imgFl"><img src="website/images/3.jpg" alt="" /></div>
</c:if>

<div class="textFl">
<div class="div_dbtj3_to">
<span>
<a href="<%=path %>report.shtml?PAGEID=datasourcelist&dt=<%=rrequest.getColDisplayValue("reportdatasourcesearch","id",p)%>">
<%=dataname%></a></span>
</div>
<p><span>空间范围:</span> <%=space_scope%></p>
<p><span>时间范围:</span> <%=time_scope%></p>
<p><span>简介:</span> <%=synopsis%></p>
</div>
</c:if>
<c:if test="${mark!=0}">
22222222
<c:if test="${imgUrl!=null}">
<c:if test="${fn:contains(imgUrl, 'htttp')}">
<div class="imgFl"><img src="${imgUrl}" alt="" /></div>
</c:if>
<c:if test="${fn:startsWith(imgUrl, 'upload')}">
<div class="imgFl"><img src="<%=path %><%=imgUrl %>" alt="" /></div>
</c:if>
</c:if>
<c:if test="${imgUrl==null}">
<div class="imgFl"><img src="website/images/3.jpg" alt="" /></div>
</c:if>

<div class="textFl">
<div class="div_dbtj3_to">
<span>
<a href="<%=rooturl %><%=rrequest.getColDisplayValue("reportdatasourcesearch","mark",p)%>" target="_blank">
<%=dataname%></a></span>
</div>
<p><span>来源:</span> <%=space_scope%></p>
<p><span>作者:</span> <%=time_scope%></p>
<p><span>内容概述:</span> <%=synopsis%></p>
</div>
</c:if>
</li>
mark等于0的也是不等于0的情况显示，求解

[孟子E章]

你在前面打印出来看mark的值究竟变化了没有