$(document).ready(function() {
    switch (sex)
    {
        case 1:
            $('.ca_wrap1').css('background', 'transparent url(\'../images/BlueLightPaw1.jpg\')  bottom left');
            $('.ca_wrap2').css('background', 'transparent url(\'../images/BlueLightPaw.jpg\')  bottom left');
            break;
        case 2:
            $('.ca_wrap1').css('background', 'transparent url(\'../images/BlueLightPaw1.jpg\')  bottom left');
            $('.ca_wrap2').css('background', 'transparent url(\'../images/BlueLightPaw.jpg\')  bottom left');
            break;
    }
});