点击更改边框颜色

Question

I have a menu consisting of 4 div boxes. I want the active box to have a red border, if another box is clicked the border is white and the border of the other box is red. Do I need JavaScript or is CSS enough?

jsfiddel div

HTML

<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>

CSS

.box{
margin: 10px;
float: left;
width: 100px;
height: 50px;
background-color: blue;
border: solid 1px red;
}

Answer 1

For click you'll need JavaScript if you want to maintain the state, hover is OK with CSS.

You can use div:active { /* style */ } for a click and hold style but it will disappear after mouse up.

This is a quick way to do it with jQuery:

$('.box').on('click', function(e){
  e.preventDefault();
  $(this).css('border-color', 'lime');
});

Probably better to toggle a class though:

JS:

$('.box').on('click', function(e){
      e.preventDefault();
      $(this).toggleClass('myClickState');
    });

CSS:

.myClickState {
  border-color: lime;
}

Answer 2

Yes, you can use the :active pseudo-selector to achieve this.

Try this:

.box:active {
    border-color: red;   
}

This, however, will not persist after you release the mouse.

It is also not supported in IE6.

Answer 3

 function fnChangeBorder(boxId) {document.getElementById(boxId).style.border = "solid #AA00FF";} 

 <div class="box" id="A" onclick="fnChangeBorder('A')">Click here !!</div> 

i chose A as a parameter because numbers won't work as a function parameters

Answer 4

Take a look at this function:

http://jqueryui.com/addClass/

It shows how to apply the click event and change the CSS class. You would simply have to create a desired class with border color.

Answer 5

You can do this via jQuery ( JSFiddle here ):

$(document).ready(function() {
  $('.box').click(function() {
    if($('.active').length) {
      $('.active').not($(this)).removeClass('active').addClass('box');
    }      
    $(this).removeClass('box').addClass('active');     
  }); 
});

Answer 6

尝试这个：

.box:focus{ border-color:#cd3232; }