function hideAll()
{
	if(document.getElementById)
	{
		for(var i = 1; i <= 4; i++)
		{
			document.getElementById("tab" + i).style.display = "none";
		}
	}
}

function showProject(tabNum)
{
	if(document.getElementById)
	{
		hideAll();
		document.getElementById("tab" + tabNum).style.display = "block";
	}
}