var trigger01;

dom.event.addEventListener(window,'load',trigger);

function trigger(){
    var trigger01 = document.getElementById('id0');
    var trigger02 = document.getElementById('id01');
    var trigger03 = document.getElementById('id02');
    var trigger04 = document.getElementById('id03');
    var trigger05 = document.getElementById('id04');
    var trigger06 = document.getElementById('id05');
    var trigger07 = document.getElementById('id06');
    var trigger08 = document.getElementById('id07');
    var trigger09 = document.getElementById('id08');
    var trigger10 = document.getElementById('id09');
    var trigger11 = document.getElementById('id10');
    var trigger12 = document.getElementById('id11');
    var trigger13 = document.getElementById('id12');
	
//display01
   dom.event.addEventListener(trigger01,'click',function(){
   fold_menu('plan00','id0');
   }); 
   
   dom.event.addEventListener(trigger02,'click',function(){
   fold_menu('plan01','id01');
   }); 
   
   dom.event.addEventListener(trigger03,'click',function(){
   fold_menu('plan02','id02');
   }); 
   
   dom.event.addEventListener(trigger04,'click',function(){
   fold_menu('plan03','id03');
   }); 
   
   dom.event.addEventListener(trigger05,'click',function(){
   fold_menu('plan04','id04');
   }); 
   
   dom.event.addEventListener(trigger06,'click',function(){
   fold_menu('plan05','id05');
   }); 
   
   dom.event.addEventListener(trigger07,'click',function(){
   fold_menu('plan06','id06');
   }); 
   
   dom.event.addEventListener(trigger08,'click',function(){
   fold_menu('plan07','id07');
   }); 
   
   dom.event.addEventListener(trigger09,'click',function(){
   fold_menu('plan08','id08');
   }); 
   
   dom.event.addEventListener(trigger10,'click',function(){
   fold_menu('plan09','id09');
   }); 
   
   dom.event.addEventListener(trigger11,'click',function(){
   fold_menu('plan10','id10');
   }); 
   
   dom.event.addEventListener(trigger12,'click',function(){
   fold_menu('plan11','id11');
   }); 
   
   dom.event.addEventListener(trigger13,'click',function(){
   fold_menu('plan12','id12');
   }); 
   
   
}

function fold_menu(id,h2id){
    var id = document.getElementById(id);
    var h2id = document.getElementById(h2id);
    
    if(id.style.display != "block"){
    id.style.display = "block";
    h2id.style.backgroundImage = "url(images/minus.gif)";
    }else{
        id.style.display = "none";
    h2id.style.backgroundImage = "url(images/plus.gif)";
        }
}