能帮我解决一个逻辑判断问题吗?
<div   class= "ldiv ">
<input   type= "image "   src= "/images/background/input_selectall.gif "   onclick= "return   selectAllCheckBox(); "/> &nbsp;
<input   type= "image "   src= "/images/background/input_cencleall.gif "   onclick= "return   unselectAllCheckBox(); "/> &nbsp;
<input   type= "image "   src= "/images/background/put_recycle.gif "   onclick= "return   recycle(); "/> &nbsp;
<input   type= "image "   src= "/images/background/input_fbagain.gif "   onclick= "return   reissue(); "/>
<%
if((chname!=   null   &&   chname.equals( "19 "))   ||   chname   ==   null){%>
<input   type= "image "   src= "/images/background/input_deleteall.gif "   onclick= "doDelete(); "/> &nbsp;
<%}%> </div>


我现在想实现..如果chname.equals( "17 ")或者chname.equals( "18 ")即显示
" <input   type= "image "   src= "/images/background/put_recycle.gif "   onclick= "return   recycle(); "/> "
这张图片.
或者也可以这么理解..当chname.equals( "19 ")时...即不显示put_recycle.gif这张图片.而显示input_deleteall.gif..
但是当chname.equals( "18 ")或者chname.equals( "17 ")这时.应该不显示input_deleteall.gif这张图片..

请问我应该怎么判断?


谢谢了..

------解决方案--------------------
<input type= "image " src= "/images/background/input_selectall.gif " onclick= "return selectAllCheckBox(); "/> &nbsp;
<input type= "image " src= "/images/background/input_cencleall.gif " onclick= "return unselectAllCheckBox(); "/> &nbsp;
<%
if(chname != null && chname.equals( "19 ")) {
%>
<input type= "image " src= "/images/background/input_deleteall.gif " onclick= "doDelete(); "/> &nbsp;
<%
} else {
%>
<input type= "image " src= "/images/background/input_fbagain.gif " onclick= "return reissue(); "/>
<%
}
%>


你是不是这个意思？-_-!