function expand_section(section_id) {
	var data_id=document.getElementById(section_id + '-data');
	var image_id=document.getElementById(section_id + '-img');
	
  if (data_id.style.display == "none")
  {
    data_id.style.display = "block";
    image_id.src = "/images/minus.gif";
    image_id.alt = "Hide Data";
	}
  else 
  {
    data_id.style.display = "none";
    image_id.src = "/images/plus.gif";
    image_id.alt = "Display Data";
  }
};