function showPortfolio()
{
	document.getElementById('menu').style.display = "block";
	document.getElementById('contact').style.display = "none";	
}

function hidePortfolio()
{
	document.getElementById('menu').style.display = "none";	
}

function showContact()
{
	document.getElementById('contact').style.display = "block";
}

function hideContact()
{
	document.getElementById('contact').style.display = "none";	
}