html - Add total from rows using javascript -


i want add total of values in table below conditions dont know how implement

<table id="tableid" width="200" border="1">   <tr>     <td class="compulsory">5</td>     <td class="compulsory">8</td>     <td class="compulsory">8</td>      <td class="one">8</td>     <td class="one">7</td>     <td class="one">6</td>      <td class="two">9</td>     <td class="two">4</td>      <td class="total"></td>   </tr> </table>

the conditions are;

table data class compulsory must added

table data class one pick highest 2 values

table data class two pick highest 1 value

then display total in table data class total

how below solution, can refactor further if needed.

<html> <body>     <table border="1" id="tableid" width="200">         <tr>             <td class="compulsory">5</td>             <td class="compulsory">8</td>             <td class="compulsory">8</td>             <td class="one">8</td>             <td class="one">7</td>             <td class="one">6</td>             <td class="two">9</td>             <td class="two">4</td>             <td class="total"></td>         </tr>     </table> </body> <script type="text/javascript"> var table = document.getelementbyid('tableid'); var tr = table.getelementsbytagname('tr')[0]; var tdscompulsory = tr.getelementsbyclassname('compulsory'); var tdsone = document.getelementsbyclassname('one'); var tdstwo = document.getelementsbyclassname('two');  var cdata = []; var onedata = []; var twodata = []; var sum = 0;  for(var in tdscompulsory){     if(typeof tdscompulsory[i].textcontent != 'undefined')     cdata.push(tdscompulsory[i].textcontent); } for(var in tdsone){     if(typeof tdsone[i].textcontent != 'undefined')     onedata.push(tdsone[i].textcontent); } for(var in tdstwo){     if(typeof tdstwo[i].textcontent != 'undefined')     twodata.push(tdstwo[i].textcontent); } console.log(cdata); console.log(onedata); console.log(twodata);  for(var in cdata){     sum +=parseint(cdata[i]); }  var maxone=0, maxtwo=0; for(var in onedata){         if(maxone < parseint(onedata[i])){             maxtwo = maxone;             maxone = parseint(onedata[i]);         } else if(maxtwo < parseint(onedata[i])){             maxtwo = parseint(onedata[i]);         } } sum += maxone + maxtwo;  var max = 0; for(var in twodata){     if(max < parseint(twodata[i])){         max = parseint(twodata[i]);     } } console.log(max);     sum +=max; console.log(sum);     document.getelementsbyclassname('total')[0].textcontent = sum; </script> </html>

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