// JavaScript Document
function nav(id){
el = document.getElementById(id);
if(el.style.display == ''){
	el.style.display = 'none';
	el.style.height = '0px';
	el.style.width = '0px';
	}
else{
	el.style.display = '';
	el.style.height = '';
	el.style.width = '';
	}

}