jQuery.fn.equalHeight = function () {
    var height        = 0;
    var maxHeight    = 0;

    // Store the tallest element's height
    this.each(function () {
        height        = jQuery(this).outerHeight();
        maxHeight    = (height > maxHeight) ? height : maxHeight;
    });

    // Set element's min-height to tallest element's height
    return this.each(function () {
        var t            = jQuery(this);
        var minHeight    = maxHeight - (t.outerHeight() - t.height());
        var property    = jQuery.browser.msie && jQuery.browser.version < 7 ? 'height' : 'min-height';

        t.css(property, minHeight + 'px');
    });
};

jQuery(function () {
jQuery('#content > div').equalHeight();
elementy = jQuery('#sidebar').children().find('li');jQuery(elementy).each( function() {if( jQuery(this).find('ul').size() !=0 )
{jQuery(this).addClass("arrow");}});
});