if (document.images) {

// mouse-over images
	  var abouton = new Image();
	 abouton.src = "/images/buttons/about_1.png";

	  var aboutoff = new Image();
	  aboutoff.src = "/images/buttons/about.png";

	  var downloadon = new Image();
	 downloadon.src = "/images/buttons/download_1.png";

	  var downloadoff = new Image();
	  downloadoff.src = "/images/buttons/download.png";
	  
	  var purchaseon = new Image();
	 purchaseon.src = "/images/buttons/purchase_1.png";

	  var purchaseoff = new Image();
	  purchaseoff.src = "/images/buttons/purchase.png";

	  var userguideon = new Image();
	 userguideon.src = "/images/buttons/userguide_1.png";

	  var userguideoff = new Image();
	  userguideoff.src = "/images/buttons/userguide.png";

	  var tryon = new Image();
	 tryon.src = "/images/buttons/try_1.png";

	  var tryoff = new Image();
	  tryoff.src = "/images/buttons/try.png";

	  var moreinfoon = new Image();
	 moreinfoon.src = "/images/buttons/moreinfo_1.png";

	  var moreinfooff = new Image();
	  moreinfooff.src = "/images/buttons/moreinfo.png";

	  var guideproon = new Image();
	 guideproon.src = "/images/buttons/userguide_pro_1.png";

	  var guideprooff = new Image();
	 guideprooff.src = "/images/buttons/userguide_pro.png";

	  var guidestdon = new Image();
	 guidestdon.src = "/images/buttons/userguide_std_1.png";

	  var guidestdoff = new Image();
	 guidestdoff.src = "/images/buttons/userguide_std.png";

	  var guideliveon = new Image();
	 guideliveon.src = "/images/buttons/userguide_live_1.png";

	  var guideliveoff = new Image();
	 guideliveoff.src = "/images/buttons/userguide_live.png";

	  var guidetbon = new Image();
	 guidetbon.src = "/images/buttons/userguide_tb_1.png";

	  var guidetboff = new Image();
	 guidetboff.src = "/images/buttons/userguide_tb.png";

}	  
	  

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


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

function toggleGuide()
{
    if (document.getElementById('guide')) {
      var displayStyle = (document.getElementById('guide').style.display)? '' : 'none' ;
      document.getElementById('guide').style.display = displayStyle;
    }
}