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JavaScript

The Jquery code of the carousel is not working properly

The carousel works fine for 5 to 10 min. But after that time the images in the carousel start to display twice instead once.

The Html code is

<div id="carousel">
   <div id="wrap">
    <div class="active-slide fir"></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
   </div>
</div>
</div>

The CSS code is

/*Carousel */

#carousel
{
    width:102%;
    height:40em;
    overflow:hidden;
    display:none;
}
#wrap
{
    width:700%;
    height:40em;
}
#wrap div
{
    width:14.4%;
    height:40em;
    float:left;
    background-size:100% 100%;
}
#wrap>div:first-child
{
    background-image:url('../images/11.jpg');
}
#wrap>div:nth-child(2)
{
    background-image:url('../images/12.jpg');
}
#wrap>div:nth-child(3)
{
    background-image:url('../images/13.jpg');
}
#wrap>div:nth-child(4)
{
    background-image:url('../images/14.jpg');
}
#wrap>div:nth-child(5)
{
    background-image:url('../images/16.png');
}
#wrap>div:last-child
{
    background-image:url('../images/17.jpg');
}

The Jquery code is

var main = function(){
    $('#menu>a').click(function(){
        $('#menu ul').slideToggle('slow');
    });
    var currentslide,nextslide,count;
    count = 0;

setInterval(function(){
        count = count+1;
        currentslide = $('.active-slide');
        nextslide = currentslide.next();
        if(count === 6)
            {
              nextslide = $('.fir');
              count = 0;
            }
        currentslide.fadeOut(1000,function(){
            nextslide.fadeIn(3500);
        });
        currentslide.removeClass('active-slide')
        nextslide.fadeOut(1000).addClass('active-slide');
},4500);
    $('p span:nth-child(2)').click(function(){
        $('p span').toggle();
    });
    $('span span').click(function(){
        $('p span').toggle();
    });
};
$(document).ready(main);