jquery - How to go next img element by javascript -

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i have many images in page.i want when click on images,image displayed on other large img tag(it's right work).then,i show next image when click next button , show previous image when click prev button.i tried ,but doesn't work properly.can me?thanks. please see code in below css code :

<style>    .slideshow {        position: relative;     }   .slideshow img {      position: absolute;    }   .show{}/*complete in future*/ </style>

html code : 

<div class="slideshow">   <img src="http://placekitten.com/200/300" width="100" height="100" alt="first image">   <img src="http://placekitten.com/200/287" width="100" height="100" alt="second image">   <img src="http://placekitten.com/200/285" width="100" height="100" alt="third image">   <img src="http://placekitten.com/200/286" width="100" height="100" alt="fourth image">   ... </div>  <img id="largeimage" src="#" width="200" height="200" alt="big image"> <button type="button" id="prev"> previous</button> <button type="button" id="next">next</button>

my js code is:

$(document).ready(function() {    /*this function set large img tag src attribute*/   $('.slideshow img').click(function() {     var src = $(this).attr("src");     $('#largeimage').attr({src: src});   });    /*next button*/   $('#next').click(function() {     var $curr = $('.slideshow img.show');     var $next = ($curr.next().lenght) ? $curr.next() : $('slideshow img').first();     var src = $next.attr("src");     $("#largeimage").attr({src: src});     $curr.removeclass('show');     $next.addclass('show');   });    /*previouse button*/   $('#prev').click(function() {     var $curr = $('.slideshow img.show');     var $next = ($curr.next().lenght) ? $curr.next() : $('slideshow img').last();     var src = $next.attr("src");     $("#largeimage").attr({src: src});     $curr.removeclass('show');     $next.addclass('show');   });  });

you can see in jsfiddle

$(document).ready(function() {  // here images hide , 1st image displayed     $('.slideshow img').hide();   $('.slideshow img:eq(0)').show();    /*this function set large img tag src attribute*/   $('.slideshow img').click(function() {     var src = $(this).attr("src");     $('#largeimage').attr({src: src});   });    /*next button*/   $('#next').click(function() {   var displayimagenumber = 0; // find index of image visible     $.each($('.slideshow img'),function(key,value){             if($(value).css('display') == 'block'){             displayimagenumber = key;         }     });      var displayimage = '';     $('.slideshow img:eq('+displayimagenumber+')').hide();     if($('.slideshow img').length == (displayimagenumber + 1)){         displayimage = $('.slideshow img:eq(0)');     }else{         displayimage = $('.slideshow img:eq('+parseint(displayimagenumber+1)+')');     }      $(displayimage).show();      var src = $(displayimage).attr("src");     $('#largeimage').attr({src: src});   });    /*previouse button*/   $('#prev').click(function() {     $.each($('.slideshow img'),function(key,value){             if($(value).css('display') == 'block'){             displayimagenumber = key;         }     });      $('.slideshow img:eq('+displayimagenumber+')').hide();     var displayimage = '';     if(displayimagenumber == 0){         displayimage = $('.slideshow img:eq('+parseint($('.slideshow img').length-1)+')');     }else{         displayimage = $('.slideshow img:eq('+parseint(displayimagenumber-1)+')');     }     $(displayimage).show();      var src = $(displayimage).attr("src");     $('#largeimage').attr({src: src});   });  });

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