var regular_pics = new Array();
var rolled_pics = new Array();

function PreloadPic (num,reg,roll)
{
 regular_pics[num] = new Image();
 regular_pics[num].src = reg;
 rolled_pics[num] = new Image();
 rolled_pics[num].src = roll;
}

/*/ CACHE IMAGES FIRST /*/

PreloadPic (0,"images/menu/menu_club.gif","images/menu/menu_club_over.gif");
PreloadPic (1,"images/menu/menu_weekly.gif","images/menu/menu_weekly_over.gif");
PreloadPic (2,"images/menu/menu_clinic.gif","images/menu/menu_clinic_over.gif");
PreloadPic (3,"images/menu/home.gif","images/menu/home_over.gif");
PreloadPic (4,"images/menu/about_us.gif","images/menu/about_us_over.gif"); 
PreloadPic (5,"images/menu/staff.gif","images/menu/staff_over.gif");
PreloadPic (6,"images/menu/registration.gif","images/menu/registration_over.gif");
PreloadPic (7,"images/menu/forms.gif","images/menu/forms_over.gif");
PreloadPic (8,"images/menu/contact_us.gif","images/menu/contact_us_over.gif");
PreloadPic (9,"images/menu/location.gif","images/menu/location_over.gif");

/*/ FUNCTIONS TO SWAP IMAGES BACK AND FORTH /*/

function roll (num)
{
 if (document.images)
  eval("document.b"+num+".src = rolled_pics["+num+"].src;");
}

function reset (num)
{
 if (document.images)
  eval("document.b"+num+".src = regular_pics["+num+"].src;");
}