JQuery :: Memory Game - Changing Picture On Mouseover

I'm currently trying to code a jQuery base memory game for school. I however got one problem right now. The cards are supposed to change picture on mouseover and change back on mouse leave. However, if you click on a picture, that card isn't supposed to turn back right away. I thought I could fix this with classes, but it doesn't work. Here's a part of the code:

$(document).ready(function() {
$("img.spelkort").mouseover(function() {
$(this).attr("src","spelkort/kortbaksidahover.jpg");
$(this).addClass("hover");
});
$("img.spelkort.hover").mouseleave(function() {
$(this).attr("src","spelkort/kortbaksida.jpg");
$(this).removeClass(".hover");
});
$("img.spelkort").click(function() {
$(this).attr("src","spelkort/kort1.jpg");
$(this).removeClass(".hover");
});});