i want to make a div click able and inside this i have another div and this also should be click able or link.

html is

 <a href="#"><div class="box">
    <div class="plus"><img src="aaa.jpg"/></div>
</div></a>

css

.box{
    float:left;
    width:100px;
    height:100px;
}
.plus{
    float:left;
    width:30px;
    height:30px;
}

can i make both divs to link and for different-different url.

and is this proper way use div inside a href ?