function buttonLight(btn)
{
	btn.style.backgroundColor = "#AAAAAA";
	btn.style.border = "1px solid #eeeeee";
}

function buttonDefault(btn)
{
	btn.style.backgroundColor = "#CFCFCF";
	btn.style.border = "1px solid #333333";
}

function swapCellImage(cell,src)
{
	cell.style.backgroundImage = 'url(' + src + ')';
}