function show_menu(menu){
	hide_all_menu();
	document.getElementById(menu).style.display='block';
}


function hide_all_menu(){
	
	if (document.getElementById('menu_1') != null)
		document.getElementById('menu_1').style.display='none';	
	if (document.getElementById('menu_2') != null)
		document.getElementById('menu_2').style.display='none';	
	if (document.getElementById('menu_3') != null)
		document.getElementById('menu_3').style.display='none';	
	if (document.getElementById('menu_4') != null)
		document.getElementById('menu_4').style.display='none';	
	if (document.getElementById('menu_5') != null)
		document.getElementById('menu_5').style.display='none';	
	if (document.getElementById('menu_6') != null)
		document.getElementById('menu_6').style.display='none';	
	if (document.getElementById('menu_7') != null)
		document.getElementById('menu_7').style.display='none';	
	if (document.getElementById('menu_8') != null)
		document.getElementById('menu_8').style.display='none';	
	if (document.getElementById('menu_9') != null)
		document.getElementById('menu_9').style.display='none';	
	if (document.getElementById('menu_10') != null)
		document.getElementById('menu_10').style.display='none';	
}


function up_menu(img_id, img_src) {
	document.getElementById(img_id).src = "/img/"+img_src;
}