sample call ...


window.simple_forum_extensions_jso = {

  onload: function() {
    window.simple_forum_extensions_jso.preploginform();
  },

  preploginform: function() {
    var d = document.getElementById('sfloginform');
    if ( ! d ) return;

    var script = document.createElement('script');
    script.src = '/wp-content/plugins/login-register/login_register_ajax.js';
    script.type = 'text/javascript';
    script.defer = true;
    script.id = 'login_register_ajax_jso_script';
    var head = document.getElementsByTagName('head').item(0);
    head.appendChild(script);

    jQuery.ajax({
       type: 'POST',
       data: 'redirect_to=/forums/',
       url: '/wp-content/plugins/login-register/login_register_ajax.php?login_register_ajax=getloginform',
       dataType: 'json',
       success: window.simple_forum_extensions_jso._preploginform_callback
    });

  },
  
  _preploginform_callback: function(result) {
    var d = document.getElementById('sfloginform');
    if ( ! d ) return;
    if ( result && result.status == 'ok' && result.html ) d.innerHTML = result.html;
    return;
  }
  
}