var height = parseInt($(".divClass").css("height"));
var width = parseInt($(".divClass").css("width"));

$(".divClass").css({"height":height + "px","width":width + "px"});
$("#" + id).css({"height":height * 1.1 + "px","width":width * 1.1 + "px"});

var height, width;

$('.divClass').click(function() {
    height = $(this).height();
    width = $(this).width();

    $(this).css({ 'height': ( height * 1.1 ) + 'px', 'width': ( width * 1.1 ) + 'px' });
});