jquery 插件bgStretcher 切换背景图片

为了给首页找一个好的特效效果，最终选定了这款插件。

下载地址:http://www.ajaxblender.com/bgstretcher-2-jquery-stretch-background-plugin-updated.html

在模板中引入以下js和css

初始话这段插件


$(function(){
var img_arr = []; //图片地址
$('BODY').bgStretcher({
images: img_arr,
imageWidth: 1920,
imageHeight: 1080,
slideDirection: 'N',
slideShowSpeed: 1000,
transitionEffect: 'fade',
sequenceMode: 'normal',
buttonPrev: '#header_controls_left',
buttonNext: '#header_controls_right',
buttonRandom: '#header_controls_center', //自己添加的随机换图片效果按钮
//pagination: '#header_controls_center',
anchoring: 'left center',
anchoringImg: 'left center',
preloadImg: true
});



});


自己添加了一段换图片的同时，文字代码也跟着替换:


(function($){
/* Variables */
var container = null;
var allLIs = '', containerStr = '';

var element = this;
var _bgStretcherPause = false;
var _bgStretcherAction = false;
var _bgStretcherTm = null;
var random_line = new Array();
var random_temp = new Array();
var r_image = 0;
var swf_mode = false;
var img_options = new Array();
var mid_arr = []; //private
var len = $(".mid_class").length;
for(i=0;i<len;i++){
mid_arr[i] = $(".mid_class").eq(i).val();
}
var index_mid = 0;
var random_index;

$.fn.bgStretcher = function(settings){

if ($('.bgstretcher-page').length || $('.bgstretcher-area').length) {
if(typeof(console) !== 'undefined' && console != null) console.log('More than one bgStretcher');
return false;
}
settings = $.extend({}, $.fn.bgStretcher.defaults, settings);
$.fn.bgStretcher.settings = settings;

function _build(body_content){
if(!settings.images.length){ return; }

_genHtml(body_content);


containerStr = '#' + settings.imageContainer;
container = $(containerStr);
allLIs = '#' + settings.imageContainer + ' LI';
$(allLIs).hide().css({'z-index': 1, overflow: 'hidden'});

if(!container.length){ return; }
$(window).resize(function(){
_resize(body_content)
});

_resize(body_content);

var stratElement = 0;
/* Rebuild images for simpleSlide */
if (settings.transitionEffect == 'simpleSlide') {
if (settings.sequenceMode == 'random') {
if(typeof(console) !== 'undefined' && console != null) {
console.log('Effect \'simpleSlide\' don\'t be to use with mode random.');
console.log('Mode was automaticly set in normal.');
}
}
$(allLIs).css({'float': 'left', position: 'static'});
$(allLIs).show();
if ($.fn.bgStretcher.settings.slideDirection == 'NW' || $.fn.bgStretcher.settings.slideDirection == 'NE') {
$.fn.bgStretcher.settings.slideDirection = 'N';
}
if ($.fn.bgStretcher.settings.slideDirection == 'SW' || $.fn.bgStretcher.settings.slideDirection == 'SE') {
$.fn.bgStretcher.settings.slideDirection = 'S';
}
if ($.fn.bgStretcher.settings.slideDirection == 'S' || $.fn.bgStretcher.settings.slideDirection == 'E') {
settings.sequenceMode = 'back';
$(allLIs).removeClass('bgs-current');
$(allLIs).eq($(allLIs).length - $.fn.bgStretcher.settings.startElementIndex - 1).addClass('bgs-current');
if ($.fn.bgStretcher.settings.slideDirection == 'E') {
l = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).width()*(-1);
t = 0;
} else { // S
t = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).height()*(-1);
l = 0;
}
$(containerStr+' UL').css({left: l+'px', top: t+'px'});
} else {
settings.sequenceMode = 'normal';
if ($.fn.bgStretcher.settings.startElementIndex != 0) {
if ($.fn.bgStretcher.settings.slideDirection == 'N') {
t = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).height()*(-1);
l = 0;
} else { // W
l = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).width()*(-1);
t = 0;
//console.log(l);
}
$(containerStr+' UL').css({left: l+'px', top: t+'px'});
}
}
}

if ($(settings.buttonNext).length || $(settings.buttonPrev).length || $(settings.pagination).length){
if (settings.sequenceMode == 'random') {
if(typeof(console) !== 'undefined' && console != null) {
console.log('Don\'t use random mode width prev-button, next-button and pagination.');
}
} else {
/* Prev and Next Buttons init */
if ($(settings.buttonPrev).length){
$(settings.buttonPrev).addClass('bgStretcherNav bgStretcherNavPrev');
$(settings.buttonPrev).click(function(){
$.fn.bgStretcher.buttonSlide('prev');
});
}
if ($(settings.buttonNext).length){
$(settings.buttonNext).addClass('bgStretcherNav bgStretcherNavNext');
$(settings.buttonNext).click(function(){
$.fn.bgStretcher.buttonSlide('next');
});
}


                   //自定义随机换按钮
if ($(settings.buttonRandom).length){
$(settings.buttonRandom).addClass('bgStretcherRandom bgStretcherNavRandom');
$(settings.buttonRandom).click(function(){
$.fn.bgStretcher.buttonSlide('random');
});
}
/* Pagination */
if ($(settings.pagination).length) {
$.fn.bgStretcher.pagination();
}
}
}

/* Random mode init */
if (settings.sequenceMode == 'random') {
var i = Math.floor(Math.random()*$(allLIs).length);
$.fn.bgStretcher.buildRandom(i);
if (settings.transitionEffect != 'simpleSlide') {
$.fn.bgStretcher.settings.startElementIndex = i;
}
stratElement = i;
} else {
if ($.fn.bgStretcher.settings.startElementIndex > ($(allLIs).length - 1)) $.fn.bgStretcher.settings.startElementIndex = 0;
stratElement = $.fn.bgStretcher.settings.startElementIndex;
if (settings.transitionEffect == 'simpleSlide') {
if ($.fn.bgStretcher.settings.slideDirection == 'S' || $.fn.bgStretcher.settings.slideDirection == 'E') {
stratElement = $(allLIs).length - 1 - $.fn.bgStretcher.settings.startElementIndex;
}
}
}

$(allLIs).eq(stratElement).show().addClass('bgs-current');
$.fn.bgStretcher.loadImg($(allLIs).eq(stratElement));

/* Go slideshow */
if(settings.slideShow && $(allLIs).length > 1){
_bgStretcherTm = setTimeout('jQuery.fn.bgStretcher.slideShow(\''+jQuery.fn.bgStretcher.settings.sequenceMode+'\', -1)', settings.nextSlideDelay);
}

};

function _resize(body_content){
var winW = 0;
var winH = 0;
var contH = 0;
var contW = 0;

if ($('BODY').hasClass('bgStretcher-container')) {
winW = $(window).width();
winH = $(window).height();
if (($.browser.msie) && (parseInt(jQuery.browser.version) == 6)) {
$(window).scroll(function(){
$('#'+settings.imageContainer).css('top', $(window).scrollTop());
}); 
}
} else {
$('.bgstretcher').css('position', 'absolute').css('top', '0px');
winW = body_content.width();
winH = body_content.height();
}

var imgW = 0, imgH = 0;
var leftSpace = 0;

// Max image size
if(settings.maxWidth != 'auto'){
if (winW > settings.maxWidth){
leftSpace = (winW - settings.maxWidth)/2;
contW = settings.maxWidth;
} else contW = winW;
} else contW = winW;
if(settings.maxHeight != 'auto'){
if (winH > settings.maxHeight){
contH = settings.maxHeight;
} else contH = winH;
} else contH = winH;

// Update container's size
container.width(contW);
container.height(contH);

// Non-proportional resize
if(!settings.resizeProportionally){
imgW = contH;
imgH = contH;
//console.log(imgW);
//console.log(imgH);
} else {
/*
var initW = settings.imageWidth, initH = settings.imageHeight;
var ratio = initH / initW;

imgW = contW;
imgH = Math.round(contW * ratio);

if(imgH < contH){
imgH = contH;
imgW = Math.round(imgH / ratio);
}
*/


               //同比例缩放图片
var initW = document.body.offsetWidth, initH = document.body.offsetHeight;
imgH = 1080 * initW / 1920;
imgW = initW;
//console.log(imgW);
//console.log(imgH);
}

// Anchoring
var mar_left = 0;
var mar_top = 0;
var anchor_arr;
if ($.fn.bgStretcher.settings.anchoring != 'left top') {
anchor_arr = ($.fn.bgStretcher.settings.anchoring).split(' ');
if (anchor_arr[0] == 'right') {
mar_left = (winW - contW);
} else {
if (anchor_arr[0] == 'center') mar_left = Math.round((winW - contW)/2);
}
if (anchor_arr[1] == 'bottom') {
mar_top = (winH - contH);
} else {
if (anchor_arr[1] == 'center') {
mar_top = Math.round((winH - contH)/2);
}
}
container.css('marginLeft', mar_left+'px').css('marginTop', mar_top+'px');
}
mar_left = 0;
mar_top = 0;
if ($.fn.bgStretcher.settings.anchoringImg != 'left top') {
anchor_arr = ($.fn.bgStretcher.settings.anchoringImg).split(' ');
if (anchor_arr[0] == 'right') {
mar_left = (contW - imgW);
} else {
if (anchor_arr[0] == 'center') mar_left = Math.round((contW - imgW)/2);
}
if (anchor_arr[1] == 'bottom') {
mar_top = (contH - imgH);
} else {
if (anchor_arr[1] == 'center') {
mar_top = Math.round((contH - imgH)/2);
}
}
}
img_options['mar_left'] = mar_left;
img_options['mar_top'] = mar_top;

// Apply new size for images
if (container.find('LI:first').hasClass('swf-mode')) {

var path_swf = container.find('LI:first').html();
container.find('LI:first').html('<div id="bgstretcher-flash">&nbsp;</div>');

var header = new SWFObject('flash/stars.swf', 'flash-obj', contW, contH, '9');
header.addParam('wmode', 'transparent');
header.write('bgstretcher-flash');

};
img_options['imgW'] = imgW;
img_options['imgH'] = imgH;

if(!settings.resizeAnimate){
container.children('UL').children('LI.img-loaded').find('IMG').css({'marginLeft': img_options["mar_left"]+'px', 'marginTop': img_options["mar_top"]+'px'});
container.children('UL').children('LI.img-loaded').find('IMG').css({'width': img_options["imgW"]+'px', 'height': img_options["imgH"]+'px'});
} else {
container.children('UL').children('LI.img-loaded').find('IMG').animate({'marginLeft': img_options["mar_left"]+'px', 'marginTop': img_options["mar_top"]+'px'}, 'normal');
container.children('UL').children('LI.img-loaded').find('IMG').animate({'width': img_options["imgW"]+'px', 'height': img_options["imgH"]+'px'}, 'normal');
}

$(allLIs).width(container.width()).height(container.height());

if ($.fn.bgStretcher.settings.transitionEffect == 'simpleSlide') {
if ($.fn.bgStretcher.settings.slideDirection == 'W' || $.fn.bgStretcher.settings.slideDirection == 'E') {
container.children('UL').width(container.width() * $(allLIs).length).height(container.height());
if ( $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) != -1 ){
l = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * container.width()*(-1);
container.children('UL').css({left: l+'px'});
}
} else {
container.children('UL').height(container.height() * $(allLIs).length).width(container.width());
if ( $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) != -1 ){
t = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).height()*(-1);
container.children('UL').css({top: t+'px'});
}
}
}

};

function _genHtml(body_content){
var code = '';
var cur_bgstretcher;


body_content.each(function(){
$(this).wrapInner('<div class="bgstretcher-page" />').wrapInner('<div class="bgstretcher-area" />');
code = '<div id="' + settings.imageContainer + '" class="bgstretcher"><ul>';
// if swf
if (settings.images.length) {
var ext = settings.images[0].split('.');
ext = ext[ext.length-1];

if (ext != 'swf') {
var ind = 0;
for(i = 0; i < settings.images.length; i++){
if (settings.transitionEffect == 'simpleSlide' && settings.sequenceMode == 'back')
ind = settings.images.length-1-i;
else ind = i;
if ($.fn.bgStretcher.settings.preloadImg) {
code += '<li><span class="image-path">' + settings.images[ind] + '</span></li>';
} else {
code += '<li class="img-loaded"><img src="' + settings.images[ind] + '" alt="" /></li>';
} 
}
} else {
code += '<li class="swf-mode">' + settings.images[0] + '</li>';
}
}

code += '</ul></div>';
cur_bgstretcher = $(this).children('.bgstretcher-area');
$(code).prependTo(cur_bgstretcher);
cur_bgstretcher.css({position: 'relative'});
cur_bgstretcher.children('.bgstretcher-page').css({'position': 'relative', 'z-index': 3});
});


};

/* Start bgStretcher */
this.addClass('bgStretcher-container');
_build(this);
};

$.fn.bgStretcher.loadImg = function(obj){
if (obj.hasClass('img-loaded')) return true;
obj.find('SPAN.image-path').each(function(){
var imgsrc = $(this).html();
var imgalt = '';
var parent = $(this).parent();
var img = new Image();

$(img).load(function () {
$(this).hide();
parent.prepend(this);
$(this).fadeIn('100');
}).error(function () {
}).attr('src', imgsrc).attr('alt', imgalt);

$(img).css({'marginLeft': img_options["mar_left"]+'px', 'marginTop': img_options["mar_top"]+'px'});
$(img).css({'width': img_options["imgW"]+'px', 'height': img_options["imgH"]+'px'});
});
obj.addClass('img-loaded');
return true;
}

$.fn.bgStretcher.play = function(){
   _bgStretcherPause = false;
   $.fn.bgStretcher._clearTimeout();
   $.fn.bgStretcher.slideShow($.fn.bgStretcher.settings.sequenceMode, -1);
   
};

$.fn.bgStretcher._clearTimeout = function(){
   if(_bgStretcherTm != null){
     clearTimeout(_bgStretcherTm);
     _bgStretcherTm = null;
   }
}

$.fn.bgStretcher.pause = function(){
 _bgStretcherPause = true;
 $.fn.bgStretcher._clearTimeout();
};

$.fn.bgStretcher.sliderDestroy = function(){
var cont = $('.bgstretcher-page').html();
$('.bgStretcher-container').html('').html(cont).removeClass('bgStretcher-container');
$.fn.bgStretcher._clearTimeout();
_bgStretcherPause = false;
}

/* Slideshow */
$.fn.bgStretcher.slideShow = function(sequence_mode, index_next){
_bgStretcherAction = true;
if ($(allLIs).length < 2) return true;
var current = $(containerStr + ' LI.bgs-current');
var next;
   
    $(current).stop(true, true);

if (index_next == -1) {
switch (sequence_mode){
case 'back':
next = current.prev();
if(!next.length){ next = $(containerStr + ' LI:last');}
break;
case 'random':
if (r_image == $(containerStr + ' LI').length) {
$.fn.bgStretcher.buildRandom(random_line[$(containerStr + ' LI').length-1]);
r_image = 0;
}
next = $(containerStr + ' LI').eq(random_line[r_image]);
r_image++;
break;
default:
next = current.next();
if(!next.length){ next = $(containerStr + ' LI:first'); }
}
} else {
next = $(containerStr + ' LI').eq(index_next);
}

$(containerStr + ' LI').removeClass('bgs-current');
$.fn.bgStretcher.loadImg(next);
next.addClass('bgs-current');

switch ($.fn.bgStretcher.settings.transitionEffect){
case 'fade':
$.fn.bgStretcher.effectFade(current, next);
break;
case 'simpleSlide':
$.fn.bgStretcher.simpleSlide();
break;
case 'superSlide':
$.fn.bgStretcher.superSlide(current, next, sequence_mode);
break;
default :
$.fn.bgStretcher.effectNone(current, next);

}
if ($($.fn.bgStretcher.settings.pagination).find('LI').length) {
$($.fn.bgStretcher.settings.pagination).find('LI.showPage').removeClass('showPage');
$($.fn.bgStretcher.settings.pagination).find('LI').eq($(containerStr + ' LI').index($(containerStr + ' LI.bgs-current'))).addClass('showPage');
}

// callback
if ($.fn.bgStretcher.settings.callbackfunction) {
if(typeof $.fn.bgStretcher.settings.callbackfunction == 'function')
$.fn.bgStretcher.settings.callbackfunction.call();
} 

if(!_bgStretcherPause){
_bgStretcherTm = setTimeout('jQuery.fn.bgStretcher.slideShow(\''+jQuery.fn.bgStretcher.settings.sequenceMode+'\', -1)', jQuery.fn.bgStretcher.settings.nextSlideDelay);
}
};

/* Others effects */
$.fn.bgStretcher.effectNone = function(current, next){
next.show();
current.hide();
_bgStretcherAction = false;
}; 
$.fn.bgStretcher.effectFade = function(current, next){
next.fadeIn( $.fn.bgStretcher.settings.slideShowSpeed );
current.fadeOut( $.fn.bgStretcher.settings.slideShowSpeed, function(){
_bgStretcherAction = false;
} );
};

$.fn.bgStretcher.simpleSlide = function(){
var t, l;
switch ($.fn.bgStretcher.settings.slideDirection) {
case 'N':
case 'S':
t = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).height()*(-1);
l = 0;
break;
default:
l = $(containerStr + ' LI').index($(containerStr + ' LI.bgs-current')) * $(containerStr).width()*(-1);
t = 0;
}
$(containerStr+' UL').animate({left: l+'px', top: t+'px'}, $.fn.bgStretcher.settings.slideShowSpeed, function(){
_bgStretcherAction = false;
});

};

$.fn.bgStretcher.superSlide = function(current, next, sequence_mode){
var t, l;
switch ($.fn.bgStretcher.settings.slideDirection) {
case 'S':
t = $(containerStr).height();
l = 0;
break;
case 'E':
t = 0;
l = $(containerStr).width();
break;
case 'W':
t = 0;
l = $(containerStr).width()*(-1);
break;
case 'NW':
t = $(containerStr).height()*(-1);
l = $(containerStr).width()*(-1);
break;
case 'NE':
t = $(containerStr).height()*(-1);
l = $(containerStr).width();
break;
case 'SW':
t = $(containerStr).height();
l = $(containerStr).width()*(-1);
break;
case 'SE':
t = $(containerStr).height();
l = $(containerStr).width();
break; 
default:
t = $(containerStr).height()*(-1);
l = 0;


}

if (sequence_mode == 'back') {
next.css({'z-index': 2, top: t+'px', left: l+'px'});
next.show();
next.animate({left: '0px', top: '0px'}, $.fn.bgStretcher.settings.slideShowSpeed, function(){
current.hide();
$(this).css({'z-index': 1});
_bgStretcherAction = false;
});
} else {
current.css('z-index', 2);
next.show();
current.animate({left: l+'px', top: t+'px'}, $.fn.bgStretcher.settings.slideShowSpeed, function(){
$(this).hide().css({'z-index': 1, top: '0px', left: '0px'});
_bgStretcherAction = false;
});
} 
};

/* Build line random images */
$.fn.bgStretcher.buildRandom = function(el_not){
var l = $(allLIs).length;
var i, j, rt;
for (i = 0; i < l; i++ ) {
random_line[i] = i;
random_temp[i] = Math.random()*l;
}
for (i = 0; i < l; i++ ) {
for (j = 0; j < (l-i-1); j++) {
if (random_temp[j] > random_temp[j+1]) {
rt = random_temp[j];
random_temp[j] = random_temp[j+1];
random_temp[j+1] = rt;
rt = random_line[j];
random_line[j] = random_line[j+1];
random_line[j+1] = rt;
}
}
}

if (random_line[0] == el_not) {
rt = random_line[0];
random_line[0] = random_line[l-1];
random_line[l-1] = rt;
}
};

/* Prev and Next buttons */
$.fn.bgStretcher.buttonSlide = function(button_point){
if (_bgStretcherAction || ($(allLIs).length < 2)) return false;
var mode = '';
if (button_point == 'prev') {
mode = 'back';
if ($.fn.bgStretcher.settings.sequenceMode == 'back') mode = 'normal';
//自己添加换文字效果
prev_text();
} else if(button_point == 'next'){
mode = $.fn.bgStretcher.settings.sequenceMode;
///自己添加换文字效果
next_text();
}else{
           //自己添加换文字效果


           mode = $.fn.bgStretcher.settings.sequenceMode;
random_text();
}
$(allLIs).stop(true, true);
$.fn.bgStretcher._clearTimeout();
$.fn.bgStretcher.slideShow(mode, -1);
return false;
};

/* Pagination */
$.fn.bgStretcher.pagination = function(){
var l = $(allLIs).length;
var output = ''; var i = 0;
if (l > 0) {
output += '<ul>';
for (i = 0; i < l; i++){
output += '<li><a href="javascript:;">'+(i+1)+'</a></li>';
}
output += '</ul>';
$($.fn.bgStretcher.settings.pagination).html(output);
$($.fn.bgStretcher.settings.pagination).find('LI:first').addClass('showPage');

$($.fn.bgStretcher.settings.pagination).find('A').click(function(){
if ($(this).parent().hasClass('showPage')) return false;
$(allLIs).stop(true, true);
$.fn.bgStretcher._clearTimeout();
$.fn.bgStretcher.slideShow($.fn.bgStretcher.settings.sequenceMode, $($.fn.bgStretcher.settings.pagination).find('A').index($(this)));
return false;
});

}
return false;
}

function changeitem (){
for(i=0;i<len;i++){
$("#movie_"+mid_arr[i]).css("display","none");
}
//console.log(index_mid);
//console.log(mid_arr);
//console.log(mid_arr[index_mid]);
$("#movie_"+mid_arr[index_mid]).css("display","block");
}

function prev_text(){
if(index_mid == 0){
index_mid = len - 1;
}else{
--index_mid;
}
changeitem();
}


function next_text(){
if(index_mid == (len-1)){
index_mid = 0;
}else{
++index_mid;
}
//console.log(index_mid);
changeitem();
}


function random_text(){
random_index = Math.ceil(Math.random() * (len-1));
if(random_index == index_mid){
++index_mid;
}else{
index_mid = random_index;
}
if(index_mid >= len){
index_mid = 0;
}
changeitem(); 
}

/* Default Settings */
$.fn.bgStretcher.defaults = {
imageContainer:       'bgstretcher',
resizeProportionally:    true,
resizeAnimate:       false,
images:           [],
imageWidth:         1024,
imageHeight:        768,
maxWidth: 'auto',
maxHeight: 'auto',
nextSlideDelay:       3000,
slideShowSpeed:       'normal',
slideShow:         true,
transitionEffect:'fade', // none, fade, simpleSlide, superSlide
slideDirection:'N', // N, S, W, E, (if superSlide - NW, NE, SW, SE)
sequenceMode: 'normal', // back, random
buttonPrev: '',
buttonNext: '',
buttonRandom: '', //自定义随机换图片按钮
pagination: '',
anchoring: 'left top', // right bottom center
anchoringImg: 'left top', // right bottom center
preloadImg: false,
startElementIndex:0,
callbackfunction:null
};
$.fn.bgStretcher.settings = {};
})(jQuery);

插件选项：

配置选项	缺省值	选项说明
imageContainer	bgstretcher	bgStretcher will automatically build structure for the images list in a DOM tree. This parameter is ID for the images holder. Try inspecting the tree with aFireBugto get an idea how it's constructed.
resizeProportionally	true	Indicates if background image(s) will be resized proportionally or not.
resizeAnimate	false	Indicates if background image(s) will be resized with animation. (Be careful, this may slow down some PCs if your images are large.)
images	empty	An array containing list of images to be displayed on page's background.
imageWidth	1024	Original image's width.
imageHeight	768	Original image's height.
maxWidth	auto	Maximum image's width.
maxHeight	auto	Maximum image's height.
nextSlideDelay	3000(3 seconds)	Numeric value in milliseconds. The parameter sets delay until next slide should start.
slideShowSpeed	normal	Numeric value in milliseconds or jQuery string value ('fast', 'normal', 'slow'). The parameter sets the speed of transition between images.
slideShow	true	Allows or disallows slideshow functionality.
transitionEffect	fade	Transition effect (use also: none, simpleSlide, superSlide).
slideDirection	N	Slide Diraction: N – north, S – south, W – west, E – East (if transitionEffect = superSlide use also: NW, NE, SW, SE).
sequenceMode	normal	Sequence mode (use also: back, random)
buttonPrev	empty	Previous button CSS selector
buttonNext	empty	Next button CSS selector
pagination	empty	CSS selector for pagination
anchoring	'left top'	Anchoring bgStrtcher area regarding window
anchoringImg	'left top'	Anchoring images regarding window
preloadImg	false	For Preload images use true
stratElementIndex	0	Start element index
callbackfunction	null	Name of callback function

插件方法：

方法名称	方法说明
$(objID).bgStretcher.play()	Resume background slideshow
$(objID).bgStretcher.pause()	Pause background slideshow
$(objID).bgStretcher.sliderDestroy()	Destroy background slideshow

浏览器兼容性： MS Internet Explorer 6, 7, 8, 9 Mozilla Firefox 2, 3, 4 Opera 9+ Apple Safari Google Chrome

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