function refresh_captcha() {
    var img = document.createElement('img');
    img.src = "/kcaptcha/index.php?" + Math.random() * 1000000;
    $(".captcha .cap_img img").replaceWith(img);
    return false;
}
$(document).ready(function() {
    if ((location.pathname.search('catalog')!=-1) || (location.pathname.search('products')!=-1 )) {
        $("#menu a[href='http://medbed.ru/']").children(".main_menu").removeClass("main_menu").addClass("main_menu_active")
    }
    $("#price_table tr:nth-child(2n+1)").css('background-color', '#DFDFDF');
    $("div.main_menu").hover(function(){
        $(this).children("span").css("background-position","-765px -171px");
        $(this).css("background-position","0px -40px");
    },function(){
        $(this).children("span").css("background-position","-765px -131px");
        $(this).css("background-position","0 0");
    });
});