how to toggle (hide/show) a table onClick of tag in java script

Answer 1

Try

<script>
  function toggleTable()
    {

    var status = document.getElementById("loginTable").style.display;

    if (status == 'block') {
      document.getElementById("loginTable").style.display="none";
    } else {
      document.getElementById("loginTable").style.display="block";
    }
  }
</script>

Answer 2

Simple using jquery

<script>
$(document).ready(function() {
    $('#loginLink').click(function() {
    $('#loginTable').toggle('slow');
    });
})
</script>