function view() {
	ul = document.getElementById('contact_us');
	li = document.getElementById('contact');
	ul.style.visibility = 'visible';
	ul.style.display  = 'block';	
}
function hide() {
	ul = document.getElementById('contact_us');		
	ul.style.visibility = 'hidden';
	ul.style.display  = 'none';
	li = document.getElementById('contact');    
}