Else statement not executed javascript

Question

Hey Guys in the below code every time the if statement is executed no matter what the condition is.

function addRow(tableID) {

            var table = document.         


        

Answer 1

style.visibility = 'hidden' -> style.visibility == 'hidden'

function addRow(tableID) {

   var table = document.getElementById(tableID);
   if((document.getElementById('select_degree').style.visibility == 'hidden') && (document.getElementById('select_degree')!=null)){
     document.getElementById('select_degree').style.visibility = 'visible';
     document.getElementById('select_ratings').style.visibility  = 'visible';
   }

   else{ 
     var rowCount = table.rows.length;
     var new_row = table.rows[rowCount-1];
     var row = table.insertRow(rowCount);                
     var colCount = table.rows[0].cells.length;

     for(var i=0; i