//Add to cart
function button_on (imgId,where)
{
    document.getElementById(imgId).src = where;
}

function button_off ( imgId )
{
    butOff = "images/add_to_cart.jpg";
    document.getElementById(imgId).src = butOff;
}

function button_go (imgId,p)
{
    butOff = "images/add_to_cart.jpg";
    document.getElementById(imgId).src = butOff;
	document.getElementById(p).submit();
}