javascript - Prev and Next buttons switch images (links to images) in array??? -

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these instructions:

"have image , 2 buttons, prev , next. have 10 images in array. when click on next, next picture should display , when click on prev, previous image should display."

this wrote far: 

<html> <head>     <title>image loop</title> </head> <body>     <img src="http://placekitten.com/500/200" id="image" style="height:150px; width:150px" />     <input type="button" value="prev" name="previous_picture" onclick= nextimage();>     <input type="button" value="next" name="next_picture"/>     <script>         function nextimage () {             var = images.indexof();             var imagesrc = document.getelementbyid("image").src=images[i];             (i = weekdays.indexof(day); i<weekdays.length; i++)         }          function previmage () {          }         var images = new array(             "http://placekitten.com/500/200",             "http://placekitten.com/499/200",             "http://placekitten.com/501/200",             "http://placekitten.com/500/199"             );     </script>  </body> </html>

* image should loop around when gets end of array. don't know i'm doing... :( *

do more investigations, shows little effort.

i'll give pointers.

javascript: generic next item in array

javascript knows modulus operation: https://msdn.microsoft.com/nl-nl/library/9f59bza0(v=vs.94).aspx

prev = (index + length - 1 ) % length

next = (index + 1 ) % length

prev needs previmage() , next needs nextimage() functions

etc.


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