if(document.images) {
	
	var nav_btt1 = new Image();
	var nav_btt2 = new Image();
	
	var nav_ctw1 = new Image();
	var nav_ctw2 = new Image();
	
	var nav_ctw21 = new Image();
	var nav_ctw22 = new Image();
	
	var nav_cre1 = new Image();
	var nav_cre2 = new Image();
	
	var nav_fee1 = new Image();
	var nav_fee2 = new Image();
	
	var nav_pri1 = new Image();
	var nav_pri2 = new Image();
	
	var nav_bac1 = new Image();
	var nav_bac2 = new Image();
	
	var nav_nex1 = new Image();
	var nav_nex2 = new Image();
	
	var nav_enl011 = new Image();
	var nav_enl012 = new Image();
	var nav_enl021 = new Image();
	var nav_enl022 = new Image();
	var nav_enl031 = new Image();
	var nav_enl032 = new Image();
	var nav_enl041 = new Image();
	var nav_enl042 = new Image();
	var nav_enl051 = new Image();
	var nav_enl052 = new Image();
	var nav_enl061 = new Image();
	var nav_enl062 = new Image();
	var nav_enl071 = new Image();
	var nav_enl072 = new Image();
	var nav_enl081 = new Image();
	var nav_enl082 = new Image();
	var nav_enl091 = new Image();
	var nav_enl092 = new Image();
	var nav_enl101 = new Image();
	var nav_enl102 = new Image();
	var nav_enl111 = new Image();
	var nav_enl112 = new Image();
	var nav_enl121 = new Image();
	var nav_enl122 = new Image();
	var nav_enl131 = new Image();
	var nav_enl132 = new Image();
	
	
	nav_btt1.src = "/wgbh/nova/galileo/images/nav_backtotop.gif";
	nav_btt2.src = "/wgbh/nova/galileo/images/nav_backtotop_on.gif";
	
	nav_ctw1.src = "/wgbh/nova/images02/nav_closethiswindow.gif";
	nav_ctw2.src = "/wgbh/nova/images02/nav_closethiswindow_on.gif";
	
	nav_ctw21.src = "/wgbh/nova/images02/nav_closethiswindow2.gif";
	nav_ctw22.src = "/wgbh/nova/images02/nav_closethiswindow2_on.gif";
	
	nav_cre1.src = "/wgbh/nova/galileo/images/nav_icon_credits.gif";
	nav_cre2.src = "/wgbh/nova/galileo/images/nav_icon_credits_on.gif";
	
	nav_fee1.src = "/wgbh/nova/galileo/images/nav_icon_feedback.gif";
	nav_fee2.src = "/wgbh/nova/galileo/images/nav_icon_feedback_on.gif";
	
	nav_pri1.src = "/wgbh/nova/images02/nav_icon_print.gif";
	nav_pri2.src = "/wgbh/nova/images02/nav_icon_print_on.gif";
	
	nav_bac1.src = "/wgbh/nova/images02/nav_icon_back.gif";
	nav_bac2.src = "/wgbh/nova/images02/nav_icon_back_on.gif";
	
	nav_nex1.src = "/wgbh/nova/images02/nav_icon_next.gif";
	nav_nex2.src = "/wgbh/nova/images02/nav_icon_next_on.gif";
	
	nav_enl011.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl012.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl021.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl022.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl031.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl032.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl041.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl042.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl051.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl052.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl061.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl062.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl071.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl072.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl081.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl082.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl091.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl092.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl101.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl102.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl111.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl112.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl121.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl122.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
	nav_enl131.src = "/wgbh/nova/images02/nav_side_enlarge.gif";
	nav_enl132.src = "/wgbh/nova/images02/nav_side_enlarge_on.gif";
}