function setTab(n,tabID,divID){
var tab_li=document.getElementById(tabID).getElementsByTagName("li"); 
	for(i=0;i<tab_li.length;i++){
	  tab_li[i].className=i==n?"current":""; 
	}
	
var tab_div=document.getElementById(divID).getElementsByTagName("div"); 

	for(i=0;i<tab_div.length;i++){
	  tab_div[i].style.display=i==n?"block":"none";
	}
	
}

function display(ID) {
  var el = document.getElementById(ID);
  
  if(el.style.display != "none")
  	{	  
		el.style.display = "none";
	}
	else{
		el.style.display = "block";
	}
}

function hide(ID) {
	var el = document.getElementById(ID);  
	el.style.display = "none";
}

function show(ID) {
	var el = document.getElementById(ID);  
	el.style.display = "block";
}

function selectchange(optionID,displayBox){
	var ids = document.getElementById(optionID);
	if(ids.selected == true){
		hide(displayBox);
	}
	else{
		show(displayBox);
		}	
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}
/*
addLoadEvent(lantern);*/