function change_class ( element , element1 ) {
	var object = document.getElementById( element )
	var object1 = document.getElementById( element1 )
	var state = object.className;
	var state1 = object1.className;
	var style = state == 'button-right' ? 'button-right-active':'button-right';
	var style1 = state1 == 'cst-link-border' ? 'cst-link-border-active':'cst-link-border';
	object.className = style;
	object1.className = style1;
}