<form>
    <input type="text" name="email" />
</form>
<a href="#" id="link">Sample Link</a>

$(document).ready(function () {
    $('#link').hover(function (){
        $('form input[name=email]').removeClass(':focus');
    }, function (){
        $('form input[name=email]').addClass(':focus');
    });
});

form input[name=email]:focus {
    background-color: yellow;
}

$(document).ready(function () {
    $('#link').hover(function (){
        $('form input[name=email]').blur();
    }, function (){
        $('form input[name=email]').focus();
    });
});

$(document).ready(function () {
$('#link').hover(function (){
     $("input").blur();
 }, function (){
      //mouse leave
});
});

$(document).ready(function () {
    $('#link').hover(function (){
        $('form input[name=email]').blur();
        $('form input[name=email]').css("background-color","");
    }, function (){
        $('form input[name=email]').focus();
        $('form input[name=email]').css("background-color"," yellow");
    });
});