function displaySubmenu(id){
	if(document.getElementById('submenu_'+id)){
		document.getElementById('submenu_'+id).style.display='block';
		if(document.getElementById('submenu_container_'+id)){
			document.getElementById('submenu_container_'+id).className='active_container';
		}
	}
}

function hideSubmenu(id){
	if(document.getElementById('submenu_'+id)){
		document.getElementById('submenu_'+id).style.display='none';
		if(document.getElementById('submenu_container_'+id)){
			document.getElementById('submenu_container_'+id).className='inactive_container';
		}
	}
}

function display(id){
	if(document.getElementById(id)){
		document.getElementById(id).style.display='';
	}
}

function hide(id){
	if(document.getElementById(id)){
		document.getElementById(id).style.display='none';
	}
}

function changeBackground(file,elementid){
	document.getElementById(elementid).style.background='url(design/'+file+'.jpg) bottom repeat-x;';
}