menu由图片组成，但是只显示一级菜单时，中间有细缝
<TR>
<TD>
<div id= 'KB1Parent ' class= 'parent '>
<A href= "# " onclick= "javascript:turndisplay( 'KB1Child '); ">
<IMG height=25 alt= " " src= "../img/menulogo_2.gif " onClick= "expandIt( 'KB1 '); return false " target= "winprogram " width=202 border=0>
</A>
</div>
</TD>
</TR>
<TR>
<TD>
<div id= 'KB1Child ' class= 'child '>
<A href= "../appJob/appJob.do?todo=appjob_introduce " target= "winprogram " class= "parent " name= 'tt '>
<IMG height=25 alt= " " src= "../img/menulogo_13.gif " width=202 border=0>
</A>
<br>
<A href= "../appJob/appJob.do?todo=appjob_introduce " target= "winprogram " class= "parent " name= 'tt '>
<IMG height=25 alt= " " src= "../img/menulogo_14.gif " width=202 border=0>
</A>
</div>
</TD>
</TR>
<TR>
<TD> <div id= 'KB2Parent ' class= 'parent '>
<A href= "# " onclick= "javascript:turndisplay( 'KB2Child '); ">
<IMG height=24 alt= " " src= "../img/menulogo_3.gif " onClick= "expandIt( 'KB2 '); return false " target= "winprogram "
width=202 border=0> </A> </div>
</TD> </TR>
<TR>
<TD>
<div id= 'KB2Child ' class= 'child '>
<A href= "../appJob/appJob.do?todo=appjob_query " target= "winprogram " class= "parent " name= 'tt '>
<IMG height=24 alt= " " src= "../img/menulogo_9.gif "
width=202 border=0>
</A> <br>
<A href= "../appJob/appJob.do?todo=appjob_query " target= "winprogram " class= "parent " name= 'tt '>
<IMG height=24 alt= " " src= "../img/menulogo_10.gif " width=202 border=0>
</A>
</div>
</TD> </TR>
[解决办法]
把table、div对象的margin、border、padding的值都设成0
