salve,
per il mio sito sto utilizzando uno script nella home page che mi permette di visualizzare le immagini a pieno schermo e di adattarsi alle diverse grandezze della finestra del browser.

Ora vorrei modificare la parte del codice che mi consenta di regolare il sia la distanza dal TOP che dal BOTTON in modo da gestire diversamente questi spazi.

il codice lo incollo qui di seguito nella speranza che qualcuno mi sappia suggerire dove intervenire per modificarlo, io ho provato a mettere valori diversi dallo zero, ma il risultato viene sempre a pieno schermo,
grazie

// VERSION: 1.1.6


(function($) {


// The maxImages plugin resizes an image dynamically, according to the width of the browser.
jQuery.fn.maxImage = function(options) {

var resizeMsgDefaults = {show: false, location: 'before', message: 'Original: ([w]w x [h]h)'};


// var opts = $.extend({}, $.fn.maxImage.defaults, options);
var opts = jQuery.extend({
wait: true,
imageArray: [],
maxFollows: 'both',
// Options: width, height, both
verticalOffset: 0,
horizontalOffset: 0,
leftSpace: 0,
topSpace: 0,
rightSpace: 0,
bottomSpace: 0,
overflow: 'hidden',
position: 'absolute',
isBackground: false,
zIndex: -1,
verticalAlign: 'top',
horizontalAlign: 'botton',
maxAtOrigImageSize: false,
slideShow: false,
slideDelay: 5,
slideShowTitle: true,
loaderClass: 'loader',
resizeMsg: resizeMsgDefaults
}, options);


// var resizeDefaults = {show: false, location: 'before', message: '(resized)'};
opts.resizeMsg = jQuery.extend(resizeMsgDefaults, options.resizeMsg)


// Cache jQuery object
var jQueryMatchedObj = this;

function _initialize() {
_start(this,jQueryMatchedObj);
return false;
}

function _start(image,jQueryMatchedObj) {
if( opts.slideShow ){
_setup_slideshow(jQueryMatchedObj);
} else if ( opts.isBackground ){
Background._setup_background(image);
} else {
Others._setup_others(image,opts);
}
}

Others = {
_setup_others: function(image,opts){
$this = $(image);

$(window).load(function(){
_get_orig_data($this);
_size_image($this);
_center_image($this);
Others._configure_css(image,opts);

$(window).resize(function(){
_size_image($this);
_center_image($this);
});
});
},
_configure_css: function(image,opts){
if(opts.position == 'absolute') {

$(image).css({
'overflow': 'hidden',
'left': opts.leftSpace,
'top': opts.topSpace,
'position': 'absolute'
});

if(opts.verticalAlign == 'bottom'){
$(image).css({'bottom'pts.bottomSpace});
}
if(opts.horizontalAlign == 'right'){
$(image).css({'right'pts.rightSpace});
}
} else {
$(image).css({
'margin-top': opts.topSpace,
'margin-right': opts.rightSpace,
'margin-bottom': opts.bottomSpace,
'margin-left': opts.leftSpace,
'position': opts.position
});
}
}
}

Background = {
_setup_background: function(image){
$this = $(image);
$this.hide();

Background._configure_css(image);
$(window).load(function(){
_get_orig_data($this);
_size_image($this);
_center_image($this);
$this.show();
$(window).resize(function(){
_size_image($this);
_center_image($this)
});
});

},
_configure_css: function(image){

// If position is set to absolute (or if isBackground)
$(image).css({
'z-index': opts.zIndex
});
if(opts.position == 'absolute') {
$(image).css({
'overflow': 'hidden',
'left': opts.leftSpace,
'top': opts.topSpace,
'position': 'absolute'
});

$('html').css({'overflow-y'pts.overflow});

if(opts.verticalAlign == 'bottom'){
$(image).css({'bottom'pts.bottomSpace});
}
if(opts.horizontalAlign == 'right'){
$(image).css({'right'pts.rightSpace});
}
} else {
$(image).css({
'margin-top': opts.topSpace,
'margin-right': opts.rightSpace,
'margin-bottom': opts.bottomSpace,
'margin-left': opts.leftSpace,
'position': opts.position
});
}
}
}



// SLIDESHOW FUNCTIONS
function _setup_slideshow (jQueryMatchedObj){
_build_slideshow_structure(jQueryMatchedObj);

opts.imageArray.length = 0;


if( jQueryMatchedObj.length == 1){
opts.imageArray.push(new Array(objClicked.getAttribute('src'),objClicked.ge tAttribute('title')));
} else {
for ( var i = 0; i < jQueryMatchedObj.length; i++ ) {
opts.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('src'),jQueryMatchedObj[i].getAttribute('title')));
$(jQueryMatchedObj[i]).attr('original',$(jQueryMatchedObj[i]).attr('src')).attr('src','');
}
}
_configure_css();
_loads_image(0);
}

function _build_slideshow_structure() {
for ( var i = 0; i < jQueryMatchedObj.length; i++ ) {
$(jQueryMatchedObj[i]).addClass('slides slide-'+i).after('<div class="slideTitle">'+$(jQueryMatchedObj[i]).attr('title')+'</div>');
}
$('.slideTitle').hide().css({
'padding':'10px',
'background':'#e0e0e0',
'position':'absolute',
'bottom':'0',
'right':'5%',
'opacity':'0.8'
});
}


function _loads_image(nums){
var currentImage = nums;

var objImagePreloader = new Image();
objImagePreloader.onload = function() {
$('.slide-'+currentImage).attr('src',opts.imageArray[currentImage][0]);
_get_orig_data($('.slide-'+currentImage));
_size_image($('.slide-'+currentImage));
_center_image($('.slide-'+currentImage));
$(window).resize(function(){
_size_image($('.slide-'+(currentImage)));
_center_image($('.slide-'+currentImage));
});

if(currentImage==0){
_start_timer();
}

if(currentImage < opts.imageArray.length-1){
_loads_image(currentImage+1);
}

}
objImagePreloader.src = opts.imageArray[currentImage][0];
}

function _start_timer() {
var currentSlide = 0;


// Hide the loading graphic
$('.'+opts.loaderClass).hide();


// Fade in first image
$('.slide-'+currentSlide).css({'z-index'pts.zIndex}).fadeIn();


// If user wants to show titles, use this option
if(opts.slideShowTitle){
$('.slide-'+currentSlide).next('.slideTitle').css({'z-index'pts.zIndex+1}).fadeIn();
}


// Start timer for slideshow
var slideInterval = setInterval(function(){
if(currentSlide < opts.imageArray.length-1){
currentSlide++;
lastSlide = currentSlide-1;
} else {
currentSlide=0;
lastSlide = opts.imageArray.length-1;
}

$('.slide-'+lastSlide).css({'z-index'pts.zIndex-1}).fadeOut('slow');
$('.slide-'+currentSlide).css({'z-index'pts.zIndex}).fadeIn('slow');
if(opts.slideShowTitle){
next_title(currentSlide,lastSlide);
}
}, (opts.slideDelay*1000));
}

function _configure_css(){
for(i=0;i<opts.imageArray.length;i++){

// Style the slide
if(opts.position == 'absolute') {
$('.slide-'+i).css({
'position': 'absolute',
'overflow': 'hidden'
});

$('html').css({'overflow-y'pts.overflow});

if(opts.verticalAlign == 'bottom'){
$('.slide-'+i).css({'bottom'pts.bottomSpace});
}else{
$('.slide-'+i).css({'top'pts.topSpace});
}

if(opts.horizontalAlign == 'right'){
$('.slide-'+i).css({'right'pts.rightSpace});
}else{
$('.slide-'+i).css({'left'pts.leftSpace});
}
} else {
$('.slide-'+i).css({
'margin-top': opts.topSpace,
'margin-right': opts.rightSpace,
'margin-bottom': opts.bottomSpace,
'margin-left': opts.leftSpace,
'position': opts.position
});
}



// Style the title
$('.slide-'+i).next('.slideTitle').css({
'position':'absolute',
'bottom':0,
'right':'5%'
});
}
}


function next_title(currentSlide,lastSlide){
$('.slide-'+lastSlide).next('.slideTitle').fadeOut();
$('.slide-'+currentSlide).next('.slideTitle').fadeIn();
}



// BROAD FUNCTIONS - FOR EACH SECTION
function _center_image(image){
$this = image;

if(opts.horizontalAlign == 'center'){
var pageWidth = $(window).width() - opts.horizontalOffset;
var newWidth = -1*($this.width() - pageWidth)/2;
$(image).css({'left':newWidth});
}


if(opts.verticalAlign == 'center'){
var pageHeight = $(window).height() - opts.verticalOffset;
var newHeight = -1*($this.height() - pageHeight)/2;
$(image).css({'top':newHeight});
}
}


function _get_orig_data(image){
$this = image;

$this.attr('origWidth', $this.width());
$this.attr('origHeight', $this.height());
$this.attr('ratio', find_ratio($this.width(),$this.height()));
}

function _size_image(image){
$this = image;

var originalWidth = to_i($this.attr('origWidth'));
var originalHeight = to_i($this.attr('origHeight'));
var ratio = $this.attr('ratio');

if(originalWidth == 0 || originalHeight == 0){
setTimeout(function(){
_get_orig_data(image);
_size_image(image);
}, 100);
return;
}

var width_and_height = [];
width_and_height = find_width_and_height(originalWidth,originalHeight ,ratio);

$this.width( width_and_height[0] );
$this.height( width_and_height[1] );

_show_resize_message(originalWidth,originalHeight, image);
}

function _show_resize_message(originalWidth,originalHeight, image){
if( (to_i($this.width()) != originalWidth || to_i($this.height()) != originalHeight) && opts.resizeMsg.show){
$(".maximage_resized").remove();


// Replace [w] and [h] with their respective width or height
opts.resizeMsg.message = opts.resizeMsg.message.replace('[w]',originalWidth).replace('[h]',originalHeight);

var insertStr = '<div class="maximage_resized">' + opts.resizeMsg.message + '</div>';
if(opts.resizeMsg.location.toLowerCase() == "before"){
$this.before(insertStr);
} else {
$this.after(insertStr);
}
}
}

function find_width_and_height(originalWidth,originalHeight ,ratio) {
var pageWidth = $(window).width() - opts.horizontalOffset;
var pageHeight = $(window).height() - opts.verticalOffset;

if(!opts.isBackground){
if(opts.maxFollows=='both'){
max_follows_width(pageWidth,ratio);

if( height > pageHeight ){
max_follows_height(pageHeight,ratio);
}
} else if (opts.maxFollows == 'width'){
max_follows_width(pageWidth,ratio);
} else if (opts.maxFollows == 'height'){
max_follows_height(pageHeight,ratio);
}
}else{
width = pageWidth + 40;
height = width/ratio;

if( height < pageHeight ){
height = pageHeight - (opts.topSpace + opts.bottomSpace);
width = height*ratio;
}
}


// If maxAtRatio == true and your new width is larger than originalWidth, size to originalWidth
if ( opts.maxAtOrigImageSize && width > originalWidth){
arrayImageSize = new Array(originalWidth,originalHeight);
}else{
arrayImageSize = new Array(width,height);
}
return arrayImageSize;
}

function max_follows_height(pageHeight,ratio){
height = pageHeight - (opts.topSpace + opts.bottomSpace);
// Page Height minus topSpace and bottomSpace
width = height*ratio;
}

function max_follows_width(pageWidth,ratio){
width = pageWidth - (opts.leftSpace + opts.rightSpace);
// Page Width minus leftSpace and rightSpace
height = width/ratio;
}

function find_ratio(width,height) {
width = to_i(width);
height = to_i(height);
var ratio = width/height;
ratio = ratio.toFixed(2);
return ratio;
}

function to_i(i){
last = parseInt(i);
return last;
}


// private function for debugging
function debug($obj) {
if (window.console && window.console.log) {
window.console.log($obj);
}
}

return this.each(_initialize);
};




})(jQuery);