//menu

var timeout         = 500;
var closetimer		= 0;
var ddmenuitem      = 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose; 

$(document).ready(function(){
  
  $('li.mainlevel').mousemove(function(){
  $(this).find('ul').slideDown();//you can give it a speed
  });
  $('li.mainlevel').mouseleave(function(){
  $(this).find('ul').slideUp("fast");
  });
  
});

//tab
function show_area(pre,n,select_n){
for (i=1;i <= n;i++){
var aread=document.getElementById(pre+i);
aread.style.display="none";
if(i==select_n){aread.style.display="block";}
}}
function hide_area(pre,n,select_n){
var aread=document.getElementById(pre+select_n);
aread.style.display="none";
}
function G(id){return document.getElementById(id);}
function show_tab(pre,pree,cls,n,select_n){
for (i=1;i <= n;i++){
var intro=G(pre+i);
var cha=G(pree+i);
intro.style.display="none";
cha.className=cls+"2";
if(i==select_n){
intro.style.display="block";
cha.className=cls+"1";
}
}
}