javascript - Image swapping when a variable changes -


i have html page has 1 image object.

i trying write javascript isn't working in script. have piece of script reads variable , if variable 'e' equal 1, 1 image appears. if 'e' other number image 2 appears. now, 'e' static, dynamic.

how change image dynamically based off variable?

any appreciated. 

    <!doctype html> <html>    <head>       <meta charset="utf-8">       <title>title of document</title>    <body onload="changei()">       <img id="im1" src="images/lion1.jpg" width="100" height="180" style="display:show">        <p> hello</p>       <script>          function changei() {          var e = 0;          changei(e);          //  changed e in e = 0;          change(e);           function changei(e) {          var loc = '';          if (image.src.match("lion1")) {          image.src = "images/lion1.jpg";          } else {          image.src = "images/lion2.jpg";          }          $('#im1').attr("src",loc); // change image source          }        </script>    </body> </html>

you can use jquery change image source. function have e inside, pass as parameter , can change image want calling function corresponding value.

var e = 1; changei(e); //  changed e in e = 0; changei(e);  function changei(e) {   var loc = '';   if (e==1) {        loc = "images/lion1.jpg";   } else {        loc = "images/lion2.jpg";   }   $('#im1').attr("src",loc); // change image source }

example: can attach event input, keyup , every time press key in input image change based on entered.

changei(1); // when entering in page set src    $('#einput').keyup(function(){ // when inserted on input      var e = $(this).val();      changei(e);  });    function changei(e) {    var loc = '';    if (e==1) {         loc = "http://images.math.cnrs.fr/local/cache-vignettes/l256xh256/section1-original-0f409.png";    } else {         loc = "http://www.data-compression.com/baboon_24bpp.gif";    }    $('#im1').attr("src",loc); // change image source  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <input type="text" id="einput" />  <img id="im1" src="images/lion1.jpg" style="display:show">


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