function positionCenterOffset(objId, offset) {
    var body = getObjectByTagName("body");
  
    var objX = body.offsetWidth;
    objX /= 2;
    objX += offset;
  
    var obj = getObjectById(objId);
    obj.style.left=objX+"px";
  }
  
  function getObjectByTagName(tagName) {
    if (isIE() && getVersion()<6)
      return document.all.tags(tagName)[0];
    else
      return document.getElementsByTagName(tagName)[0];
  }
  
  function getObjectById(objId) {
    if (isIE() && getVersion()<6)
      return document.all[objId];
    else 
      return document.getElementById(objId);
  }
  
  function resizePage() {
    positionCenterOffset("navi", -438);
    positionCenterOffset("content", -261);
    positionCenterOffset("header", -261);
  }
  
  function initPage() {
    resizePage();
  }
  
  function sendMail(person) {
    var address = { 'om':'ocvvjkcuBhqtvgikc0fg' ,
                    'fortegia':'kphqBhqtvgikc0fg',
                    'rg':'ujc{gppga97Bjqvockn0eqo' };
    var encrypted = address[person];
    
    if (encrypted != '') {
      var plain = '';
    
      for (var i=0;i<encrypted.length;i++) {
        plain=plain+String.fromCharCode(encrypted.charCodeAt(i)-2);
      }
      window.location.href="mailto:"+plain;
    }
  }
  
  function isIE() {
    var agent = navigator.userAgent;
    if (agent.indexOf('MSIE') != -1)
      return true;
    else
      return false;
  }
  
  function getVersion() {
    var agent = navigator.userAgent;
    var version = 0;
    
    // MSIE
    var index = agent.indexOf('MSIE');
    if (index != -1)
      version = agent.substr(index+5, 1);
      
    return version;
  }
  
  function toggleVisibility(objId) {
    var obj = getObjectById(objId);
    var display = obj.style.display;
    
    if (!display || display == '' || display == 'none')
      obj.style.display = 'block';
    else
      obj.style.display = 'none';
  }