function website_item_1()
{
	obj = document.getElementById('site_item_about')
	if( obj.style.display == '' )
		obj.style.display = 'none';
	else
		obj.style.display = '';
}
function website_item_2()
{
	obj = document.getElementById('site_item_infor')
	if( obj.style.display == '' )
		obj.style.display = 'none';
	else
		obj.style.display = '';
}
function website_item_3()
{
	obj = document.getElementById('site_item_news')
	if( obj.style.display == '' )
		obj.style.display = 'none';
	else
		obj.style.display = '';
}
function website_item_4()
{
	obj = document.getElementById('site_item_act')
	if( obj.style.display == '' )
		obj.style.display = 'none';
	else
		obj.style.display = '';
}
function website_item_5()
{
	obj = document.getElementById('site_item_knlge')
	if( obj.style.display == '' )
		obj.style.display = 'none';
	else
		obj.style.display = '';
}