See example of the following here →

No need for a plugin. This can be accomplished with very little jQuery code, showing a blackout overlay with the selected div at a z-index above it:

$('.expose').click(function(e){
    $(this).css('z-index','99999');
    $('#overlay').fadeIn(300);
});

$('#overlay').click(function(e){
    $('#overlay').fadeOut(300, function(){
        $('.expose').css('z-index','1');
    });
});

According to the following HTML & CSS... just add the expose class to any element you want isolated on click:

<div class="expose">Some content</div>
<textarea class="expose">Some content</textarea><br />
<input type="text" class="expose" value="Some content" /><br />
<div id="overlay"></div>

.expose {
    position:relative;
}

#overlay {
    background:rgba(0,0,0,0.3);
    display:none;
    width:100%; height:100%;
    position:absolute; top:0; left:0; z-index:99998;
}

See example →

What about using the outline CSS property?

input[type="search"] {
    -webkit-appearance: textfield;
    background:url('icons.png') #fff no-repeat 5px -601px;
    padding:0 10px 0 32px!important;
    width:168px;
    outline: 0px rgba(0,0,0,0) solid;
    transition: outline-color .3s
}
input[type="search"]:focus{
    z-index:1000;
    position:relative;
    border:1px solid #f60;
    outline: 5000px rgba(0,0,0,.8) solid ;
}

this applies a very large outline on focused inputs with fade transition.

Example:

Look at jQuery Tool's Expose plugin. That's probably what you want.