<c:if test="${iscontain}"&gt;
    <img id="sign_${device[0]}" name="sign_${device[0]}" 
         src="images/expantion/ok_sign.png"/&gt;
<span style="white-space:pre"&gt;   </span></c:if>

<c:if test="${!iscontain}"&gt;
        <img id="sign_${device[0]}" name="sign_${device[0]}" 

src="images/expantion/add_sign.png"/>