function addEvent(elm, evType, fn, useCapture) {
  if (elm.addEventListener) {
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if (elm.attachEvent) {
    var r = elm.attachEvent('on' + evType, fn);
    return r;
  }
  else {
    elm['on' + evType] = fn;
  }
}

function preventDefault(e) {
  if (e.preventDefault) {
      e.preventDefault();
  }

  try {
    e.returnValue = false;
  } catch (e) {
  }
}

function ltarget(e) {
  var tmp;

  try {
    tmp = e.target;
    if (tmp != undefined) { return tmp; }
  } catch(e) {
  }

  try {
    tmp = e.srcElement;
    return tmp;
  } catch(e) {
  }

  return tmp;
}



function activa_tab(e) {
	//window.event.cancelBubble();
	preventDefault(e);
	var my_target = ltarget(e);
  var c = document.getElementById(my_target.href.substr(my_target.href.indexOf("#") + 1));
                 if (c) {

                                 //reset all tabs
                                for (var i = 0; i < my_target.tabs.length; i++)
                                      {
                                         document.getElementById(my_target.tabs[i].href.substr(my_target.tabs[i].href.indexOf("#") + 1)).style.display = "none";
                                         my_target.tabs[i].className = my_target.tabs[i].className.replace("active", "");
                                        }
                                my_target.className += " active";
                                c.style.display = "block";
	}
                              return false;
 
}
function initTabs()
{
	var sets = document.getElementsByTagName("ul");
	for (var i = 0; i < sets.length; i++)
	{
		if (sets[i].className.indexOf("tabset") != -1)
		{
			var tabs = [];
			var links = sets[i].getElementsByTagName("a");
			for (var j = 0; j < links.length; j++)
			{
				if (links[j].className.indexOf("tab") != -1)
				{
					tabs.push(links[j]);
					links[j].tabs = tabs;
					if (links[j].className.indexOf("active") != -1)
					{
						var c = document.getElementById(links[j].href.substr(links[j].href.indexOf("#") + 1));
						if (c)
							c.style.display = "block";
					}
					addEvent(links[j], 'click', activa_tab, false);			
				}
			}
		}
	}
}
addEvent(window, 'load', initTabs, false);
/*if (window.addEventListener)
	window.addEventListener("load", initTabs, false);
else if (window.attachEvent)
	window.attachEvent("onload", initTabs);*/