I am trying to write a small function that would replace a picture src when hovered (see code below)

- $(".myimgisthis").hover(function(){

var oldimg = $(".myimgisthis img").attr("src");

var newimg = $(".fiimgi img").attr("src");

$(this).attr("src", newimg);

}, function(){

$(this).attr("src", ouimg);

});

The reason why I want to use variables and $(this) situations, is because I need this function to work on an PHP output of a SQL database......so I am not aware of the old image and new image src (otherwise this could be so much easier).

Can someone please help?