function getmeatcenter(mydiv) {
mydiv.css('top', $(window).height() / 2 - mydiv.height() / 2);
mydiv.css('left', $(window).width() / 2 - mydiv.width() / 2);
}
function clearPopup() {
    $('.modalBack').remove();
    $('.myPopup').hide();
    $('.myPopup').css('display', 'none');
}
function myPopup(id) {
    try {
		
        clearPopup();
        $(document.body).append('<div class="modalBack" style="position:absolute;z-index:100080;top:0;left:0;width:100%;height:' + $(document).height() + 'px;">&nbsp;</div>');
        var mydiv;
        if (id == null || id == undefined)
            mydiv = $('.myPopup');
        else
            mydiv = $('#' + id);
			
        mydiv.css('position', 'absolute');
        getmeatcenter(mydiv);
        mydiv.css('position', 'fixed');
        $(".modalBack").css('position', 'fixed');
        mydiv.fadeIn(500);
    } catch (e) { }
}