function setUpNav() {

  switch(currentCategory) {
	  // company
		case "comp":
	  		var pageImage = document.getElementById('comp_img');
	 		pageImage.src = "../images/btn_company_over.jpg";
		break
		
		case "capa":
	  		var pageImage = document.getElementById('capa_img');
	 		pageImage.src = "../images/btn_cap_over.jpg";
		break
		
		case "work":
	  		var pageImage = document.getElementById('work_img');
	 		pageImage.src = "../images/btn_work_over.jpg";
		break
		
		case "contact":
	  		var pageImage = document.getElementById('contact_img');
	 		pageImage.src = "../images/btn_contact_over.jpg";
		break
		
		case "gsa":
	  		var pageImage = document.getElementById('gsa_img');
	 		pageImage.src = "../images/btn_gsa_over.jpg";
		break
		
		case "opm":
	  		var pageImage = document.getElementById('opm_img');
	 		pageImage.src = "../images/btn_opm_over.jpg";
		break
		
		case "s508":
	  		var pageImage = document.getElementById('s508_img');
	 		pageImage.src = "../images/btn_s508_over.jpg";
		break
		
		default:
		// no action
  }
  
  
 }
 
 
 function setUpSubNav() {

  switch(currentPage) {
	  // company
		case "co1":
	  		var pageImage = document.getElementById('comp1_img');
	 		pageImage.src = "../images/about_over.jpg";
	
		break
		
		case "co2":
	  		var pageImage = document.getElementById('comp2_img');
	 		pageImage.src = "../images/news_over.jpg";
		break
		
		case "co2_news":
	  		var pageImage = document.getElementById('comp2_img');
	 		pageImage.src = "../../images/news_over.jpg";
		break
		
		case "co3":
	  		var pageImage = document.getElementById('comp3_img');
	 		pageImage.src = "../images/jobs_over.jpg";
		break
		
		case "co5":
	  		var pageImage = document.getElementById('comp5_img');
	 		pageImage.src = "../images/strategic_over.jpg";
		break
		
		//capabilities - no sub nav
		case "ca1":
	  		var pageImage = document.getElementById('capa1_img');
	 		pageImage.src = "../images/capa_overview_over.jpg";
		break
		
		case "ca2":
	  		var pageImage = document.getElementById('capa2_img');
	 		pageImage.src = "../images/capa_custom_over.jpg";
		break
		
		case "ca3":
	  		var pageImage = document.getElementById('capa3_img');
	 		pageImage.src = "../images/capa_interactive_over.jpg";
		break
		
		case "ca4":
	  		var pageImage = document.getElementById('capa4_img');
	 		pageImage.src = "../images/capa_consulting_over.jpg";
		break
		
		case "ca5":
	  		var pageImage = document.getElementById('capa5_img');
	 		pageImage.src = "../images/capa_automated_over.jpg";
		break
		
		case "ca6":
	  		var pageImage = document.getElementById('capa6_img');
	 		pageImage.src = "../images/capa_logistics_over.jpg";
		break
		
		case "ca7":
	  		var pageImage = document.getElementById('capa7_img');
	 		pageImage.src = "../images/capa_training_over.jpg";
		break
		
		case "wo2":
	  		var pageImage = document.getElementById('work1_img');
	 		pageImage.src = "../images/btn_work_federal_over.jpg";
		break
		
		case "wo3":
	  		var pageImage = document.getElementById('work2_img');
	 		pageImage.src = "../images/btn_work_dhs_over.jpg";
		break
		
		case "wo4":
	  		var pageImage = document.getElementById('work3_img');
	 		pageImage.src = "../images/btn_work_dod_over.jpg";
		break
		
		case "wo5":
	  		var pageImage = document.getElementById('work4_img');
	 		pageImage.src = "../images/btn_work_assoc_over.jpg";
		break
		
		case "wo6":
	  		var pageImage = document.getElementById('work5_img');
	 		pageImage.src = "../images/btn_work_univ_over.jpg";
		break
		
		case "wo7":
	  		var pageImage = document.getElementById('work6_img');
	 		pageImage.src = "../images/btn_work_commercial_over.jpg";
		break
		
		case "me1":
	  		var pageImage = document.getElementById('media1_img');
	 		pageImage.src = "../images/btn_media_featured_over.jpg";
		break
		
		case "me2":
	  		var pageImage = document.getElementById('media2_img');
	 		pageImage.src = "../images/btn_media_class_over.jpg";
		break
		
		case "me3":
	  		var pageImage = document.getElementById('media3_img');
	 		pageImage.src = "../images/btn_media_elearning_over.jpg";
		break
		
		case "me4":
	  		var pageImage = document.getElementById('media4_img');
	 		pageImage.src = "../images/btn_media_preso_over.jpg";
		break
		
		case "me5":
	  		var pageImage = document.getElementById('media5_img');
	 		pageImage.src = "../images/btn_media_games_over.jpg";
		break
		
		case "me6":
	  		var pageImage = document.getElementById('media6_img');
	 		pageImage.src = "../images/btn_media_analyses_over.jpg";
		break
		
		case "me7":
	  		var pageImage = document.getElementById('media7_img');
	 		pageImage.src = "../images/btn_media_print_over.jpg";
		break
		
		case "me8":
	  		var pageImage = document.getElementById('media8_img');
	 		pageImage.src = "../images/btn_media_delivery_over.jpg";
		break
		
		case "me9":
	  		var pageImage = document.getElementById('media9_img');
	 		pageImage.src = "../images/btn_media_video_over.jpg";
		break
		
		case "me10":
	  		var pageImage = document.getElementById('media10_img');
	 		pageImage.src = "../images/btn_media_websites_over.jpg";
		break
		
		case "none":
		break
		
		default:
		
  }
  
    setUpNav();
 }
 
 


function setupRollovers() {
  if (!document.getElementsByTagName)
    return;
  var all_links = document.getElementsByTagName('a');
  for (var i = 0; i < all_links.length; i++) {
    var link = all_links[i]; 
    if (link.className &&
        (' ' + link.className + ' ').indexOf(' rollover ') != -1) {
      if (link.childNodes &&
          link.childNodes.length == 1 &&
          link.childNodes[0].nodeName.toLowerCase() == 'img') {
        link.onmouseover = mouseover;
        link.onmouseout = mouseout;
      }
    }
  }
  setUpSubNav();

}

function find_target(e)
{
  /* Begin the DOM events part, which you */
  /* can ignore for now if it's confusing */
  var target; 

  if (window.event && window.event.srcElement) 
    target = window.event.srcElement;
  else if (e && e.target)
    target = e.target;
  if (!target)
    return null;

  while (target != document.body &&
      target.nodeName.toLowerCase() != 'a')
    target = target.parentNode;

  if (target.nodeName.toLowerCase() != 'a')
    return null;

  return target;
}

function mouseover(e) {
  var target = find_target(e);
  if (!target) return;

  // the only child node of the a tag in target will be an img tag
  var img_tag = target.childNodes[0];

  // Take the "src", which names an image called "something.ext",
  // Make it point to "something_over.ext"
  // This is done with a regular expression
  img_tag.src = img_tag.src.replace(/(\.[^.]+)$/, '_over$1');
}

function mouseout(e) {
  var target = find_target(e);
  if (!target) return;

  // the only child node of the A-tag in |target| will be an IMG-tag
  var img_tag = target.childNodes[0];

  // Take the "src", which names an image as "something_over.ext",
  // Make it point to "something.ext"
  // This is done with a regular expression
  img_tag.src = img_tag.src.replace(/_over(\.[^.]+)$/, '$1');
}

// When the page loads, set up the rollovers
//window.onload = setupRollovers;