(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)

$(document).ready(function() {
	jQuery.preLoadImages("images/main-nav-01-csrsales-on.jpg","images/main-nav-02-capabilities-on.jpg","images/main-nav-03-estimate-on.jpg","images/main-nav-04-ftp-on.jpg","images/main-nav-05-tutorials-on.jpg","images/main-nav-06-newsletters-on.jpg","images/main-nav-07-contact-on.jpg");
	var strTemp = $(".main-navigation a[href*='"+strCurNav+"'] img").attr("src");
	strTemp = strTemp.replace("-off.","-on.");
	$(".main-navigation a[href*='"+strCurNav+"'] img").attr("src",strTemp);
	$(".main-navigation a img[src*='-off.']").mouseover(function() {
		var tmpSrc = $(this).attr("src");
		$(this).attr("src",tmpSrc.replace("-off.","-on."));
		delete tmpSrc;
	}).mouseout(function() {
		var tmpSrc = $(this).attr("src");
		$(this).attr("src",tmpSrc.replace("-on.","-off."));
		delete tmpSrc;
	});
});