javascript - Count number of elements in the html table -

what approach should use count number of elements in html table.?

for eg: if have 3*3 table , need count number of a's , b's

                                  b   b                 b   

this javascript function retrive content of each cell , after getting content can write own logic on that

<script>  function getcellvalues() {     var reftab = document.getelementbyid("your_table_id")     var  ttl;      // loop through rows , columns of table , popup alert value     // /content of each cell.       ( var = 0; row = reftab.rows[i]; i++ ) {         row = reftab.rows[i];         ( var j = 0; col = row.cells[j]; j++ ) {           alert(col.firstchild.nodevalue);         }       }  } </script> 

and below code fulfill requirement

<script> function getaandbcount() { var reftab = document.getelementbyid("your_table_id") var  ttl; var a=0; var b=0; ( var = 0; row = reftab.rows[i]; i++ ) {    row = reftab.rows[i];    ( var j = 0; col = row.cells[j]; j++ ) {        if(col.firstchild.nodevalue == 'a'){         a++;        }else if(col.firstchild.nodevalue == 'b'){            b++;         }    } } alert(a); alert(b); } </script>