var section ='home';

// Mouse over navigation
function mouse_enter(image,name)
 {
 document.images[section].src='images/' + section + '_b.gif'; 
 document.images[image].src='images/' + name + '_ul.gif'; 
 }

// Mouse over navigation
function mouse_exit(image,name)
 {
 document.images[section].src='images/' + section + '_ul.gif'; 
 document.images[image].src='images/' + name + '_b.gif'; 
 }

function start_a_tag(URL,image)
 {
 document.write("<A HREF=\""+URL+"\" onMouseOver=\"mouse_enter('"+image+"','"+image+"')\" onMouseOut=\"mouse_exit('"+image+"','"+image+"')\">");
 }

function img_tag(URL,width,height,name)
 {
 document.write('<IMG SRC="'+URL+'" WIDTH="'+width+'" HEIGHT="'+height+'" BORDER="0" NAME="'+name+'">');
 }

function img_bar()
 {
 document.write('<IMG SRC="images/bar_b.gif" WIDTH="4" HEIGHT="31">');
 }

function end_a_tag()
 {
 document.write("</A>");
 }

// Write the main nav
function write_nav(nav_section,project)
 {
 section = nav_section;
 
 var home = "index.html";
 var projects = "projects.html";
 var schematic = "schematic.html";
 var building = "building.html";
 var software = "software.html";
 var ordering = "ordering.html";
 
 if(project == "usbdmx")
  {
  schematic = "http://usbdmx.com/schematic.html";
  building = "http://usbdmx.com/building.html";
  ordering = "http://usbdmx.com/ordering.html";
  software = "http://usbdmx.com/software.html";
  }

 if(project == "ledtester")
  {
  if(section != "building")
   building = "building_led_tester.html";
 
  if(section != "projects")
   projects = "projects_led_tester.html";
  }

 if(project == "pic")
  {
  if(section != "schematic")
   schematic = "schematic_pic.html";

  if(section != "building")
   building = "building_pic.html";
 
  if(section != "projects")
   projects = "projects_pic.html";

  if(section != "software")
   software = "software_pic.html";
  }
 
 if(project == "relay")
  {
  if(section != "schematic")
   schematic = "schematic_dmx_relay.html";

  if(section != "building")
   building = "building_dmx_relay.html";
 
  if(section != "projects")
   projects = "projects_dmx_relay.html";

  if(section != "software")
   software = "software_dmx_relay.html";
  }


 if(project == "analogue")
  {
  if(section != "projects")
   projects = "projects_dmx_analogue.html";
  }



 if(section == 'home')
  {
  document.write("<A HREF=\""+home+"\">");
  img_tag('images/home_ul.gif',63,31,'home');
  end_a_tag();
  var img1 = new Image();
  img1.src = "images/home_b.gif";
  }
 else
  {
  var img1 = new Image();
  img1.src = "images/home_ul.gif";
  start_a_tag(home,'home','home');
  img_tag('images/home_b.gif',63,31,'home');
  end_a_tag();
  }
 img_bar();

 if(section == 'projects')
  {
  var img2 = new Image();
  img2.src = "images/projects_b.gif";
  document.write("<A HREF=\""+projects+"\">");
  img_tag('images/projects_ul.gif',78,31,'projects');
  end_a_tag();
  }
 else
  {
  var img2 = new Image();
  img2.src = "images/projects_ul.gif";
  start_a_tag(projects,'projects','projects');
  img_tag('images/projects_b.gif',78,31,'projects');
  end_a_tag();
  }
 img_bar();

 if(section == 'schematic')
  {
  var img2 = new Image();
  img2.src = "images/schematic_b.gif";
  document.write("<A HREF=\""+schematic+"\">");
  img_tag('images/schematic_ul.gif',94,31,'schematic');
  end_a_tag();
  }
 else
  {
  var img2 = new Image();
  img2.src = "images/building_ul.gif";
  start_a_tag(schematic,'schematic','schematic');
  img_tag('images/schematic_b.gif',94,31,'schematic');
  end_a_tag();
  }
 img_bar();

 if(section == 'building')
  {
  var img2 = new Image();
  img2.src = "images/building_b.gif";
  document.write("<A HREF=\""+building+"\">");
  img_tag('images/building_ul.gif',78,31,'building');
  end_a_tag();
  }
 else
  {
  var img2 = new Image();
  img2.src = "images/building_ul.gif";
  start_a_tag(building,'building','building');
  img_tag('images/building_b.gif',78,31,'building');
  end_a_tag();
  }
 img_bar();
 
 if(section == 'software')
  {
  var img4 = new Image();
  img4.src = "images/software_b.gif";
  document.write("<A HREF=\""+software+"\">");
  img_tag('images/software_ul.gif',85,31,'software');
  end_a_tag();
  }
 else
  {
  var img4 = new Image();
  img4.src = "images/software_ul.gif";
  start_a_tag(software,'software','software');
  img_tag('images/software_b.gif',85,31,'software');
  end_a_tag();
  }
 img_bar();

 if(section == 'ordering')
  {
  var img5 = new Image();
  img5.src = "images/ordering_b.gif";
  document.write("<A HREF=\""+ordering+"\">");
  img_tag('images/ordering_ul.gif',88,31,'ordering');
  end_a_tag();
  }
 else
  {
  var img5 = new Image();
  img5.src = "images/ordering_ul.gif";
  start_a_tag(ordering,'ordering','ordering');
  img_tag('images/ordering_b.gif',88,31,'ordering');
  end_a_tag();
  }
 
 }