function showMainShadow(isShow)
{
    if (isShow)
    {
        $('#mainShadow').width($(window).width()-1);
        $('#mainShadow').height($(document).height());
        $('#mainShadow').show();
    }
    else $('#mainShadow').hide();
}

function showRegForm(tabName)
{
    var f = syquery.page.components['regForm'];
    f.showTab(tabName);
    f.show(true);
}