function mark(bt)
{
	var newSrc = "images/Services_mark_de.jpg";
	bt.src = newSrc;
}


function unmark(bt)
{

	var newSrc = "images/Services_de.jpg";
	bt.src = newSrc;

}
function mark2(bt)
{
	var newSrc = "images/Services2_mark_de.jpg";
	bt.src = newSrc;
}


function unmark2(bt)
{

	var newSrc = "images/Services2_de.jpg";
	bt.src = newSrc;

}