I could do it myself!!!
First you have to draw the four corner´s highlights on HTML:
<img id="clt" src="https://stackoverflow.com/questions/17506028/img/clt.png" border="0" style="position:absolute;visibility:hidden"></span>
<img id="crt" src="img/crt.png" border="0" style="position:absolute;visibility:hidden"></span>
<img id="crb" src="img/crb.png" border="0" style="position:absolute;visibility:hidden"></span>
<img id="clb" src="img/clb.png" border="0" style="position:absolute;visibility:hidden"></span>
After, create a JavaScript function:
function getFocusFunct(){
$("input[type=text], input[type=password], textarea").focus(function(){
var ctl=$(this);
var offset=ctl.offset();
var clt=$("#clt");
var crt=$("#crt");
var crb=$("#crb");
var clb=$("#clb");
clt.css('visibility','visible');
crt.css('visibility','visible');
crb.css('visibility','visible');
clb.css('visibility','visible');
clt.animate({top:offset.top-3, left:offset.left-3}, 150);
crt.animate({top:offset.top-3, left:offset.left+ctl.outerWidth()-4}, 150);
crb.animate({top:offset.top+ctl.outerHeight()-4,left:offset.left+ctl.outerWidth()-4}, 150);
clb.animate({top:offset.top+ctl.outerHeight()-4,left:offset.left-3}, 150);
});
$("input[type=text], input[type=password], textarea").blur(function(){
clt.css('visibility','hidden');
crt.css('visibility','hidden');
crb.css('visibility','hidden');
clb.css('visibility','hidden');
});
}
It´s super awesome effect!!! Try it 🙂
solved How to create an highlight animation when a control gets focused [closed]