if (document.images) {
  var nav01on = new Image()
  nav01on.src="images/mn_001on.gif"
  var nav01off = new Image()
  nav01off.src="images/mn_001off.gif"
  
  var nav02on = new Image()
  nav02on.src="images/mn_002on.gif"
  var nav02off = new Image()
  nav02off.src="images/mn_002off.gif"
  
  var nav03on = new Image()
  nav03on.src="images/mn_003on.gif"
  var nav03off = new Image()
  nav03off.src="images/mn_003off.gif"

  var nav04on = new Image()
  nav04on.src="images/mn_004on.gif"
  var nav04off = new Image()
  nav04off.src="images/mn_004off.gif"

  var nav05on = new Image()
  nav05on.src="images/mn_005on.gif"
  var nav05off = new Image()
  nav05off.src="images/mn_005off.gif"

  var nav06on = new Image()
  nav06on.src="images/mn_006on.gif"
  var nav06off = new Image()
  nav06off.src="images/mn_006off.gif"

  var nav07on = new Image()
  nav07on.src="images/mn_007on.gif"
  var nav07off = new Image()
  nav07off.src="images/mn_007off.gif"
  
  var nav08on = new Image()
  nav08on.src="images/top2_regi_btn_on.gif"
  var nav08off = new Image()
  nav08off.src="images/top2_regi_btn.gif"
  
  var nav09on = new Image()
  nav09on.src="images/top2_con_btn_on.gif"
  var nav09off = new Image()
  nav09off.src="images/top2_con_btn.gif"

  var nav10on = new Image()
  nav10on.src="images/mn_008on.gif"
  var nav10off = new Image()
  nav10off.src="images/mn_008off.gif"
  
  //about
  
  var nav001on = new Image()
  nav001on.src="images/about_mn001on.gif"
  var nav001off = new Image()
  nav001off.src="images/about_mn001off.gif"
   
    
  var nav002on = new Image()
  nav002on.src="images/about_mn002on.gif"
  var nav002off = new Image()
  nav002off.src="images/about_mn002off.gif"
   
    
  var nav003on = new Image()
  nav003on.src="images/about_mn003on.gif"
  var nav003off = new Image()
  nav003off.src="images/about_mn003off.gif"
   
    
  var nav004on = new Image()
  nav004on.src="images/about_mn004on.gif"
  var nav004off = new Image()
  nav004off.src="images/about_mn004off.gif"
   
    
  var nav005on = new Image()
  nav005on.src="images/about_mn005on.gif"
  var nav005off = new Image()
  nav005off.src="images/about_mn005off.gif"
   
   var nav006on = new Image()
  nav006on.src="images/about_mn006on.gif"
  var nav006off = new Image()
  nav006off.src="images/about_mn006off.gif"
   
 
  
}

function inact(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + 'off.src');
}

function act(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + 'on.src');
}

function rangazo(){
ca = new Array();
ca[0] = 'images/p001.jpg';
ca[1] = 'images/p002.jpg';
ca[2] = 'images/p003.jpg';
ca[3] = 'images/p004.jpg';
ca[4] = 'images/p005.jpg';
p = Math.round(Math.random() * 4); 
document.write('<IMG SRC="' +ca[p]+ '">');
}