html - How to change the logo depending on page with javascript? -


i trying set logo display bigger logo desktops , smaller image smaller devices smartphones...

this i've tried until now, doesn't works.

can me? what's wrong code?

<html> <head> <script type="text/javascript"> function load(){     document.getelementbyid('logo').src = displaylogo(); } function displaylogo(){     if ($(window).width() < 1024) {// code small viewports         return "http://i.imgur.com/ozyv740.png"; // small logo     }      else {// code large viewports         return "http://i.imgur.com/rmv6af0.png"; //big logo     } } </script> </head> <body onload="load()">     <img src="http://i.imgur.com/rmv6af0.png" id="logo" name="logo" title="the original logo big logo"/> </body> </html>

because of not use jquery try in case :

to work in js:

if (window.innerwidth < 1024) {// code small viewports     //^^^^^^^^^^^

if want use jquery:

function displaylogo() {     if ($(window).width() < 1024) {         $("#logo").attr("src","http://i.imgur.com/ozyv740.png"); // small logo     }      else {         $("#logo").attr("src","http://i.imgur.com/rmv6af0.png"); //big logo     }  }  $(window).resize(function () {     displaylogo(); }); $(document).ready(function () {     displaylogo(); });

i suggest use css instead:

<span id="logo"></span>

css:

#logo {     display: inline-block;     width: 50px;     height: 50px;     background: url(http://i.imgur.com/ozyv740.png) no-repeat; /* small */ } @media screen , (min-width: 1024px) {     #logo {         width: 100px;         height: 100px;         background: url(http://i.imgur.com/rmv6af0.png) no-repeat; /* big */     } }

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