// toggle by class 

function getElementsByClassName(classname, node)  {
    if(!node) node = document.getElementsByTagName("body")[0];
    var a = [];
    var re = new RegExp('\\b' + classname + '\\b');
    var els = node.getElementsByTagName("*");
    for(var i=0,j=els.length; i<j; i++)
        if(re.test(els[i].className))a.push(els[i]);
    return a;
}

function toggleByClass(className, node)
{
   var elems = getElementsByClassName(className, node);
   for(var i=0,j=elems.length; i<j; i++)
   {
      if (elems[i].style.display=='')
        elems[i].style.display='none';
      else 
        elems[i].style.display='';
   }
}

function toggle(element)
{
  var e = document.getElementById(element);
  
  if (e.style.display == 'none')
  {
     e.style.display = 'block';
  } 
  else
  {
   	 e.style.display = 'none';
  }
}