当我使用Javascript单击导航菜单链接时，如何更改页面的背景图像？

Question

How can i change Background-image of the page when i click on navigation link using JavaScript ?

<li><a href="#"id="bd"onclick ="one()">facial</a></li>

<script>
 function one(){
   document.getElementById('bd').style.background-image=url(eye.jpg);
   }
</script>

Answer 1

Background image can be update with backgroundImage and the value should be string so wrap it with quotes.

 <li><a href="#" id="bd" onclick="one()">facial</a> </li> <script> function one() { document.getElementById('bd').style.backgroundImage = 'url(eye.jpg)'; } </script> 

---

Also you can simplify the code by passing the element reference.

 <li><a href="#" id="bd" onclick="one(this)">facial</a> </li> <script> function one(ele) { ele.style.backgroundImage = 'url(eye.jpg)'; } </script> 

Answer 2

You could set up a class with the background image and then just add that class with JavaScript:

.eye {
   background-image: url(eye.jpg);
}

function one() {
   document.getElementById('bd').classList.add('eye');
}

That way you can also do any styling you need to do with the image.