if (document.images) {
    preload_image_object = new Image();
    // set image url
    image_url = new Array();
    image_url[0] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_nurse_off.jpg";
    image_url[1] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_nurse_on.jpg";
    image_url[2] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_couple_off.jpg";
    image_url[3] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_couple_on.jpg";
    image_url[4] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_grapefruit_off.jpg";
    image_url[5] = "/ColgateSensitiveNew/US/EN/Common/Images/WidePod_grapefruit_on.jpg";

    var i = 0;
    for(i=0; i<=5; i++) 
    preload_image_object.src = image_url[i];
}