function ExplorerFix() {
    for (a in document.links) document.links[a].onfocus = document.links[a].blur;
  }
    
  if (document.all) {
    document.onmousedown = ExplorerFix;
  }

  function newImage(arg) {
	  if (document.images) {
		  rslt = new Image();
		  rslt.src = arg;
		  return rslt;
	  }
  }

  function changeImagesArray(array) {
	  if (preloadFlag == true) {
		  var d = document; var img;
		  for (var i=0; i<array.length; i+=2) {
			  img = null; var n = array[i];
			  if (d.images) {img = d.images[n];}
			  if (!img && d.getElementById) {img = d.getElementById(n);}
			  if (img) {img.src = array[i+1];}
		  }
	  }
  }

  function changeImages() {
	  changeImagesArray(changeImages.arguments);
  }

  var preloadFlag = false;
  function preloadImages() {
	  if (document.images) {
		  pre_nav_site_over_05 = newImage('images/nav_site_over_05.jpg');
		  pre_nav_site_over_06 = newImage('images/nav_site_over_06.jpg');
		  pre_nav_site_over_07 = newImage('images/nav_site_over_07.jpg');
		  pre_nav_site_over_08 = newImage('images/nav_site_over_08.jpg');
		  pre_nav_site_over_09 = newImage('images/nav_site_over_09.jpg');
		  pre_nav_site_over_10 = newImage('images/nav_site_over_10.jpg');
		  pre_nav_site_over_11 = newImage('images/nav_site_over_11.jpg');
		  pre_nav_site_over_12 = newImage('images/nav_site_over_12.jpg');
		  preloadFlag = true;
	  }
  }