function change_image(a){
	actual = document.getElementById('selected_image');
	actual.id = '';
	a.id = 'selected_image';
	lb_a = document.getElementById('lb_a');
	lb_a.href = a.firstChild.src.replace('5_','1_');
	lb_img = document.getElementById('lb_img');
	lb_img.src = a.firstChild.src.replace('5_','6_');
}



function getXY(event) {
  x =  event.clientX;
  y =  event.clientY;
  return x+''+y;
}