function tabs(tab,container,tabcopy,newclass)
{
	var tabx = document.getElementById(tab).style;
	var containerx = document.getElementById(container);
	var copydivs = document.getElementById(tabcopy).getElementsByTagName('div');
	
	for (var i=0;i<copydivs.length;i++)
	{
		copydivs[i].style.display = 'none';
	}

	tabx.display = 'block';
	containerx.className = newclass;
	
	return false;
}