javascript - Scroll issue on table row removal -

i have following html code:

<tr id="cv643" ondblclick="oncve(643)">   <td colspan="2">     <a onclick="btncva(41,643)" href="#">       actions         <span class="badge badgew">2</span>     </a>   </td>   <td>confirm appointment</td>   <td>29-12-2015</td>   <td style="color: red">12-01-2016</td>   <td style="color: red">pending</td>   <td colspan="2"></td> </tr> 

client code is:

function btncva(cpkey, cvkey) {     var sel, tbl;   if (onhidecva()) {   // test if action list there     $.ajax call create table row id 'reccva'   } }  function onhidecva() {    var sel, rc=1;   if ((sel = document.getelementbyid('reccva')) !== null) {     sel.parentnode.removechild(sel);     rc=0;   }   return rc; }    

when actions button clicked, btncva creates row underneath reccva structure, row contains sub-table button on [thead] call onhidecva, removes reccva tr structure such:

<tr id="reccva">   <td></td>   <td colspan="7">     <table id="tblcva" class="table table-condensed">       <thead id="q643">         <tr class="lpinfo">           <th></th>           <th>action</th>           <th>date</th>           <th>user</th>           <th>recipient</th>           <th>due date</th>           <th>status</th>           <th>note</th>           <th style="text-align:right">             <button id="addcva" class="btn btn-info btn-xs" onclick="btncvaa(643)">add action</button>             <button class="btn btn-info btn-xs" onclick="onhidecva()">- </button>           </th>         </tr>       </thead>       <tbody>         (lots of trs)     </table> 

so there call onhidecva btncva, , straight call onhidecva on inner button. in instances page larger screen, if click on button calls onhidecva directly, reccva row removed, , page not scroll. want. if click on btncva a-link, onhidecva called indirectly, row removed, page scrolls top. not want. can't figure out. calling onhidecva directly removes row , nothing. calling onhidecva indirectly via btncva removes row scrolls top of page. confusing.

firefox 40.0.3.

any help? thanks. eric.