<!--
 nav1_off = new Image();	   nav1_off.src  = "images/nav/nav1_off.gif";
 nav1_on  = new Image();	   nav1_on.src   = "images/nav/nav1_on.gif";
 nav2_off = new Image();	   nav2_off.src  = "images/nav/nav2_off.gif";
 nav2_on  = new Image();	   nav2_on.src   = "images/nav/nav2_on.gif";
 nav3_off = new Image();	   nav3_off.src  = "images/nav/nav3_off.gif";
 nav3_on  = new Image();	   nav3_on.src   = "images/nav/nav3_on.gif";
 nav4_off = new Image();	   nav4_off.src  = "images/nav/nav4_off.gif";
 nav4_on  = new Image();	   nav4_on.src   = "images/nav/nav4_on.gif";
 nav5_off = new Image();	   nav5_off.src  = "images/nav/nav5_off.gif";
 nav5_on  = new Image();	   nav5_on.src   = "images/nav/nav5_on.gif";
 
 sub_off  = new Image();       sub_off.src   = "images/nav/sub_off.gif";
 sub_on   = new Image();       sub_on.src    = "images/nav/sub_on.gif";
 
 // -->