// JAVASCRIPT FOR nav_xxx.html DOCUMENTS



// IMAGE PRELOADER
var imageUrls = new Array("images/btn_thin_off.gif",
                          "images/btn_thin_on.gif",
                          "images/btn_thin_hover.gif");
var preloadImages = new Array();
for (var i=0; i<imageUrls.length; i++) 
{
   preloadImages[i] = new Image();
   preloadImages[i].src = imageUrls[i];
}


// BUTTON ONCLICK EVENT
function btnOn(btnNum)
{
   btnNum=parseInt(btnNum)
   for (var i=1; i<17; i++)
   {
      if (i == btnNum)
      {
         eval('document.images.button_'+i+'.src="images/btn_thin_on.gif"')
      }
      else
      {
         eval('document.images.button_'+i+'.src="images/btn_thin_off.gif"')
      }
   }
}


// BUTTON ONMOUSEOVER EVENT
function btnHover(btnNum) { eval('document.images.button_'+ btnNum +'hover.style.visibility="visible"'); }


// BUTTON ONMOUSEOUT EVENT
function btnOut(btnNum) { eval('document.images.button_'+btnNum+'hover.style.visibility="hidden"'); }