I want to create some kind of checkboxes which is totally image base. This means that when I click that image then the border color change to some kind of color: lets say blue and stay blue until the next click which cancel it.
The problem is that I don't know from where to start, I have create some kind of checkboxes base image with green mark, but I don't succeed to convert them to my desired request.
This is the final result,which I need to get:

The images are hosted on tinypic in the following links: http://i68.tinypic.com/b5496s.jpg http://i67.tinypic.com/2vdk07r.png
This is my code so far, which isn't on the right direction at all:
input[type="checkbox"]:not(old){
width: 28px;
margin: 0;
padding: 0;
opacity: 0;
}
input[type="checkbox"]:not(old)+label{
display: inline-block;
margin-left: -28px;
padding-left: 28px;
line-height: 24px;
background: url(http://code.stephenmorley.org/html-and-css/styling-checkboxes-and-radio-buttons/checks.png) no-repeat 0 0;
}
input[type="checkbox"]:not(old):checked + label{
background-position : 0 -24px;
}
<div class="checkbox">
<input id="chk1" type="checkbox" name="animal" value="dog"/>
<label id="lbl1" >Dog</label>
<br>
<input id="chk2" type="checkbox" name="animal" value="cat"/>
<label id="lbl2" >Cat</label>
<br>
<input id="chk3" type="checkbox" name="animal" value="horse"/>
<label id="lbl3" >Horse</label>
</div>
:not(old): what isold?:not()selector).oldis a simple selector intended to not match anything.