javascript - JS: Slideshow inaccurate result -

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hi write simple javascript slideshow cause want write own slideshow in javascript. automatically change images set time interval. when try click backward , forward function result not accurate or images in order.

	var images = ["http://i1214.photobucket.com/albums/cc487/myelstery/1.jpg","http://i1214.photobucket.com/albums/cc487/myelstery/2.jpg","http://i1214.photobucket.com/albums/cc487/myelstery/3.jpg"];    	var = 0;  	var count = images.length;   	  	function slidingimages()   	{  			i = % count;  			document.banner.src = images[i];  			i++;  	}  	  	function forward()  	 {  		 = (i + 1) % count;  		 document.banner.src=images[i];  	 }  	   	function backward()   	{  		if (i <= 0)   		{  			i = count - 1;  		}   		else   		{  			i--;  		}  		document.banner.src=images[i];  	}  	   	window.onload = function()   	{  	  slidingimages(),setinterval(slidingimages, 3000)  	};	
<center>  <p>  <img src="images/1.jpg" name="banner" id="name"/>  </p>  <input type="button" value="&laquo;prev" onclick="backward()">   <input type="button" value="next&raquo;" onclick="forward()">  </center>

what solution slideshow accurate?

this pause automatic behavior when mouse within red rectangle , continue in auto mode once mouse out of red rectangle. buttons of course work expected.

   <!doctype html>     <html>     <head>     <meta charset="utf-8">     <title></title>     <style>     fieldset { width: -moz-fit-content; width: -webkit-fit-content; width: fit-content; border: 1px solid red; }     </style>     </head>     <body>     <section>       <p>         <img src="images/1.jpg" name="banner" id="name"/>       </p>       <fieldset id="control">       <input id="prev" type="button" value="◄">       <input id="next" type="button" value="►">       </fieldset>     </section>     <script>      var images = ["http://i1214.photobucket.com/albums/cc487/myelstery/1.jpg","http://i1214.photobucket.com/albums/cc487/myelstery/2.jpg","http://i1214.photobucket.com/albums/cc487/myelstery/3.jpg"];              var = -1;             var count = images.length;              var prev = document.getelementbyid('prev');                 var next = document.getelementbyid('next');                 var control = document.getelementbyid('control');                 var autoslide;               window.onload = auto;                 function auto() {               autoslide = setinterval(fwd, 3000)        };                 function pause() {                     clearinterval(autoslide);                 }              function fwd() {                  if (i >= 0 && < 2)                  {                     += 1;                 }                  else                  {                     = 0;                 }                 document.banner.src=images[i];             }              function rev() {                  if (i > 0 && <= 2)                  {                     -= 1;                 }                  else                  {                     = 2;                 }                 document.banner.src=images[i];             }                  prev.addeventlistener('click', function() {                      rev();                 }, false);                  next.addeventlistener('click', function() {                    fwd();                 }, false);                  control.addeventlistener('mouseover', function() {                      pause();                 }, false);                  control.addeventlistener('mouseout', function() {                    auto();                 }, false);                   </script>     </body>     </html>

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