if (document.images) 	
	{
		//preload the popup images
	   img1 = new Image();
	   img2 = new Image();
	   img3 = new Image();
	   
	   img1.src = "_img/petition_popup_thank_you.jpg";
	   img2.src = "_img/petition_form_text_thankyou.jpg";
	   img3.src = "_img/emailthanks_text_thankyou.jpg";
	   
	}