var openDialog = function(title, html) {
    var dialog = $('#dialogWin');
    if (dialog.size() == 0) {
        $('body').append('<div class="fd" id="dialogWin"></div>');
        dialog = $('#dialogWin');
    }

    dialog.html('<h3>' + title + '</h3><span style="margin-top:-15px;float:right;cursor:pointer;" onclick="CloseDialog();">关闭</span>' + html);

    var l = document.documentElement.scrollLeft + (document.documentElement.clientWidth - dialog.width()) / 2;
    var t = document.documentElement.scrollTop + (document.documentElement.clientHeight - dialog.height()) / 2;

    dialog.css('position', 'absolute').css('left', l + 'px').css('top', t + 'px');
    
    dialog.fadeIn('normal');
};

var CloseDialog = function() {
    $('#dialogWin').fadeOut();
};