jQuery.fn.showMsg = function (json) {
    if (json == null)
        json = {};
    var bodyScrollSize = this.getBodyScrollSize();
    var bodySize = this.getBodySize();
    var left = bodyScrollSize.left;
    var top = bodyScrollSize.top;
    if (json.autoMiddle != true) {
        if (json.left) left = left + json.left;
        if (json.top) top = top + json.top;
    }
    else if (json.autoMiddle == true) {
        var _w = this.width();
        var _h = this.height();
        top = (bodySize.height - _h) / 2 + top;
        left = (bodySize.width - _w) / 2;
    }
    if (top + this.height() > bodyScrollSize.height)
        bodyScrollSize.height = top + this.height();
    if (left + this.width() > bodyScrollSize.width)
        bodyScrollSize.width = left + this.width();

    if (json.coverBody == true) {
        $("<iframe id='jq_effect_backGroundIframe' style='z-index:1;filter:mask();overflow:hidden;border:0px;margin:0; padding:0;position:absolute;width:" + bodyScrollSize.width + "px;height:" + bodyScrollSize.height + "px;top:0px;left:0px' scrolling='auto' frameborder='0' ></iframe>").appendTo("body");
        var jqCover = $("<div id='jq_effect_backGroundDiv'></div>");
        var _css = { "background-color": json.color == undefined ? "#000" : json.color, "position": "absolute", "overflow": "hidden", "-moz-opacity": "0.75", "filter": "alpha(opacity=75)", "z-index": "2", "opacity": "0.75", "top": "0px", "left": "0px", "width": bodyScrollSize.width, "height": bodyScrollSize.height };
        jqCover.css(_css);
        jqCover.appendTo("body");
    }
    if (typeof (json.msg) != "undefined")
        this.html(json.msg);
    this.css("height", "auto");
    this.css("position", "absolute").css("z-index", "100");
    this.css("left", left + "px").css("top", top + "px").fadeIn("slow");
    if (jQuery.msgShowObj != undefined) {
        try { jQuery.msgShowObj.fadeOut('slow'); } catch (e) { };
    }
    jQuery.msgShowObj = this;
    if (typeof (json.callback) != "undefined")
        jQuery.msgCallBack = json.callback;
    else
        jQuery.msgCallBack = null;
    jQuery.cc = undefined;
    if (json.autoClose != false) {
        jQuery.cc = window.setTimeout("try{jQuery.msgShowObj.closeMsg();}catch(e){}", json.time == undefined ? 2000 : json.time);
    }
    return this;
}
jQuery.fn.closeMsg = function () {
    this.fadeOut('slow', jQuery.msgCallBack);
    jQuery.msgShowObj = undefined;
    $('#jq_effect_backGroundIframe').remove();
    $('#jq_effect_backGroundDiv').remove();

    return this;
}

jQuery.fn.getBodyScrollSize = function () {
    var bodySL, bodyST, bodySW, bodySH;
    if (window.pageXOffset) {
        bodySL = window.pageXOffset;
        bodySW = window.innerWidth;
        bodyST = window.pageYOffset;
        bodySH = window.innerHeight;
    }
    else if (document.documentElement) {
        bodySL = document.documentElement.scrollLeft;
        bodySW = document.documentElement.scrollWidth; //-10
        bodyST = document.documentElement.scrollTop;
        bodySH = document.documentElement.clientHeight > document.documentElement.scrollHeight ? document.documentElement.clientHeight : document.documentElement.scrollHeight;
    }
    else if (document.body) {
        bodySL = document.body.scrollLeft;
        bodySW = document.body.scrollWidth;
        bodyST = document.body.scrollTop;
        bodySH = document.body.clientHeight > document.body.scrollHeight ? document.body.clientHeight : document.body.scrollHeight;
    }

    return { "top": bodyST, "left": bodySL, "width": bodySW, "height": bodySH };
}

jQuery.fn.getBodySize = function () {
    var bodyCW, bodyCH;
    if (window.innerWidth)
        bodyCW = window.innerWidth;
    else if (document.documentElement && document.documentElement.clientWidth)
        bodyCW = document.documentElement.clientWidth;
    else if (document.body)
        bodyCW = document.body.clientWidth; //author: meizz 

    if (window.innerHeight)
        bodyCH = window.innerHeight;
    else if (document.documentElement && document.documentElement.clientHeight)
        bodyCH = document.documentElement.clientHeight;
    else if (document.body)
        bodyCH = document.body.clientHeight;

    return { "width": bodyCW, "height": bodyCH };
}