// JavaScript Document


function addExtra()
{
	if (document.getElementById('buttonExtra'))
	{
		var button = document.getElementById('buttonExtra');
	}
	else if (document.getElementById('buttonExtraGreen'))
	{
		var button = document.getElementById('buttonExtraGreen');
	}
	else if (document.getElementById('buttonExtrablue'))
	{
		var button = document.getElementById('buttonExtrablue');
	}
	else
	{
		return;
	}
	
	var extraDIV = document.getElementById('extra');
	
	extraDIV.style.display = 'none';
	
	button.extra = extraDIV;
	button.onclick = function()
	{
		
		this.extra.style.display = 'block';
		this.style.display = 'none';
		
		return false;
	}
}

window.onload = addExtra;