How to jump to a specified frame page?

Question

1. A frame group is built using the frame [top, middle (left, right), bottom] and named top1 left1, right1, foot1 respectively. The code is as follows: <frameset rows='15%,*,8% ' frameborder='no'>
   <frame name='top1' noresize='noresize' scrolling='no' src="top1.html" />
   <!--Frame within frame -->
   <frameset cols='15%,*' frameborder='yes' border="2">
   <frame name='lef1' noresize='noresize' scrolling='yes ' src="canpin.html" />
   ; <frame name='right1' noresize='noresize' src="right1.html" />
   ; </frameset>
   < frame name='foot1' noresize='noresize' scrolling='no' src="foot1.html" />
   </frameset>

2. Question: I want Jump to the window of lef1 in TOP1.html Code: <li class="layui-nav-item "><a href="shuiju.html" tatget="lef1">Electronic Tax Bureau</ a></li> cannot be displayed in the lef1 window, but is replaced in the original window. How to solve it? Thanks