current tab is still active even after reload

[nadiam]

     var tabLinks = new Array();
    var contentDivs = new Array();

    function init() {

      // Grab the tab links and content divs from the page
      var tabListItems = document.getElementById('tabs').childNodes;
      for ( var i = 0; i < tabListItems.length; i++ ) {
        if ( tabListItems[i].nodeName == "LI" ) {
          var tabLink = getFirstChildWithTagName( tabListItems[i], 'A' );
          var id = getHash( tabLink.getAttribute('href') );
          tabLinks[id] = tabLink;
          contentDivs[id] = document.getElementById( id );
        }
      }

      // Assign onclick events to the tab links, and
      // highlight the first tab
      var i = 0;

      for ( var id in tabLinks ) {
        tabLinks[id].onclick = showTab;
        tabLinks[id].onfocus = function() { this.blur() };
        if ( i == 0 ) tabLinks[id].className = 'selected';
        i++;
      }

      // Hide all content divs except the first
      var i = 0;

      for ( var id in contentDivs ) {
        if ( i != 0 ) contentDivs[id].className = 'tabContent hide';
        i++;
      }
    }

    function showTab() {
      var selectedId = getHash( this.getAttribute('href') );

      // Highlight the selected tab, and dim all others.
      // Also show the selected content div, and hide all others.
      for ( var id in contentDivs ) {
        if ( id == selectedId ) {
          tabLinks[id].className = 'selected';
          contentDivs[id].className = 'tabContent';
        } else {
          tabLinks[id].className = '';
          contentDivs[id].className = 'tabContent hide';
        }
      }

      // Stop the browser following the link
      return false;
    }

    function getFirstChildWithTagName( element, tagName ) {
      for ( var i = 0; i < element.childNodes.length; i++ ) {
        if ( element.childNodes[i].nodeName == tagName ) return element.childNodes[i];
      }
    }

    function getHash( url ) {
      var hashPos = url.lastIndexOf ( '#' );
      return url.substring( hashPos + 1 );
    }

That is my js for my tabs and as the title article entails i want the current tab to be active even after reload.
for example my webpage has 12 tabs for each month (January, february ... etc) and as for the tab content there is a form, table and save button. say i go to the february tab and fill in the form and then click save, i want it to still stay on the feb tab page instead of reverting back to january tab page which is what it does now. how do i achieve this??

this is a sample of my html tab code:

<ul id="tabs">
      <li><a href="#jan">January</a></li>
      <li><a href="#feb">February</a></li>
      <li><a href="#march">March</a></li>
</ul>

<div class="tabContent" id="jan">
    <form method="post" action="income.php">
    <table border="1" rules="groups" cellpadding="10px;" class="tableincome">
        <thead>
            <th>Monthly Salary</th>
            <th></th>
            <th>RM</th>
        </thead>
        <tr>
            <td>Basic Salary</td>
            <td></td>
            <td><center><input type="text" name="basic" size="11" placeholder="0" value="<?php if(isset($_POST['basic'])){echo htmlentities($_POST['basic']);} ?>"></center></td>
        </tr>
    </table>
    <input type="submit" value="Save" class="jansave" name="jansave">
</div>

thanks in advance!

[noelthefish]

easiest way is to stop using the submit button that resubmits your form.

use a <button> and call a phpsave program using JQuery.

If you dont want to do it that way then when you submit your form your javascript has to keep track of what your current tab is and NOT run init() again.