/*
 * jQuery blockUI plugin
 * Version 2.03 (04/28/2008)
 * @requires jQuery v1.2.3 or later
 *
 * Examples at: http://malsup.com/jquery/block/
 * Copyright (c) 2007-2008 M. Alsup
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Thanks to Amir-Hossein Sobhi for some excellent contributions!
 */
(function($) {
    if (/1\.(0|1|2)\.(0|1|2)/.test($.fn.jquery) || /^1.1/.test($.fn.jquery)) {
        alert('blockUI requires jQuery v1.2.3 or later!  You are using v' + $.fn.jquery);
        return
    }
    $.blockUI = function(opts) {
        install(window, opts)
    };
    $.unblockUI = function(opts) {
        remove(window, opts)
    };
    $.fn.block = function(opts) {
        return this.each(function() {
            if ($.css(this, 'position') == 'static') this.style.position = 'relative';
            if ($.browser.msie) this.style.zoom = 1;
            install(this, opts)
        })
    };
    $.fn.unblock = function(opts) {
        return this.each(function() {
            remove(this, opts)
        })
    };
    $.blockUI.version = 2.03;
    $.blockUI.defaults = {
        message: '<h1>Please wait...</h1>',
        css: {
            padding: 15,
            margin: 0,
            width: '30%',
            top: '40%',
            left: '35%',
            textAlign: 'center',
            color: '#000',
            border: '3px solid #aaa',
            backgroundColor: '#fff',
            cursor: 'wait'
        },
        overlayCSS: {
            backgroundColor: '#000',
            opacity: '0.6'
        },
        baseZ: 10001,
        centerX: true,
        centerY: true,
        allowBodyStretch: true,
        constrainTabKey: true,
        fadeOut: 400,
        applyPlatformOpacityRules: true
    };
    var ie6 = $.browser.msie && /MSIE 6.0/.test(navigator.userAgent);
    var pageBlock = null;
    var pageBlockEls = [];
    function install(el, opts) {
        var full = (el == window);
        var msg = opts && opts.message !== undefined ? opts.message: undefined;
        opts = $.extend({},
        $.blockUI.defaults, opts || {});
        opts.overlayCSS = $.extend({},
        $.blockUI.defaults.overlayCSS, opts.overlayCSS || {});
        var css = $.extend({},
        $.blockUI.defaults.css, opts.css || {});
        msg = msg === undefined ? opts.message: msg;
        if (full && pageBlock) remove(window, {
            fadeOut: 0
        });
        if (msg && typeof msg != 'string' && (msg.parentNode || msg.jquery)) {
            var node = msg.jquery ? msg[0] : msg;
            var data = {};
            $(el).data('blockUI.history', data);
            data.el = node;
            data.parent = node.parentNode;
            data.display = node.style.display;
            data.parent.removeChild(node)
        }
        var z = opts.baseZ;
        var lyr1 = ($.browser.msie) ? $('<iframe class="blockUI" style="z-index:' + z+++';border:none;margin:0;padding:0;position:absolute;width:100%;height:100%;top:0;left:0" src="javascript:false;"></iframe>') : $('<div class="blockUI" style="display:none"></div>');
        var lyr2 = $('<div class="blockUI" style="z-index:' + z+++';cursor:wait;border:none;margin:0;padding:0;width:100%;height:100%;top:0;left:0"></div>');
        var lyr3 = full ? $('<div class="blockUI blockMsg blockPage" style="z-index:' + z + ';position:fixed"></div>') : $('<div class="blockUI blockMsg blockElement" style="z-index:' + z + ';display:none;position:absolute"></div>');
        if (msg) lyr3.css(css);
        if (!opts.applyPlatformOpacityRules || !($.browser.mozilla && /Linux/.test(navigator.platform))) lyr2.css(opts.overlayCSS);
        lyr2.css('position', full ? 'fixed': 'absolute');
        if ($.browser.msie) lyr1.css('opacity', '0.0');
        $([lyr1[0], lyr2[0], lyr3[0]]).appendTo(full ? 'body': el);
        var expr = $.browser.msie && (!$.boxModel || $('object,embed', full ? null: el).length > 0);
        if (ie6 || expr) {
            if (full && opts.allowBodyStretch && $.boxModel) $('html,body').css('height', '100%');
            if ((ie6 || !$.boxModel) && !full) {
                var t = sz(el, 'borderTopWidth'),
                l = sz(el, 'borderLeftWidth');
                var fixT = t ? '(0 - ' + t + ')': 0;
                var fixL = l ? '(0 - ' + l + ')': 0
            }
            $.each([lyr1, lyr2, lyr3],
            function(i, o) {
                var s = o[0].style;
                s.position = 'absolute';
                if (i < 2) {
                    full ? s.setExpression('height', 'document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + "px"') : s.setExpression('height', 'this.parentNode.offsetHeight + "px"');
                    full ? s.setExpression('width', 'jQuery.boxModel && document.documentElement.clientWidth || document.body.clientWidth + "px"') : s.setExpression('width', 'this.parentNode.offsetWidth + "px"');
                    if (fixL) s.setExpression('left', fixL);
                    if (fixT) s.setExpression('top', fixT)
                } else if (opts.centerY) {
                    if (full) s.setExpression('top', '(document.documentElement.clientHeight || document.body.clientHeight) / 2 - (this.offsetHeight / 2) + (blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + "px"');
                    s.marginTop = 0
                }
            })
        }
        lyr3.append(msg).show();
        if (msg && (msg.jquery || msg.nodeType)) $(msg).show();
        bind(1, el, opts);
        if (full) {
            pageBlock = lyr3[0];
            pageBlockEls = $(':input:enabled:visible', pageBlock);
            setTimeout(focus, 20)
        } else center(lyr3[0], opts.centerX, opts.centerY)
    };
    function remove(el, opts) {
        var full = el == window;
        var data = $(el).data('blockUI.history');
        opts = $.extend(true, {},
        $.blockUI.defaults, opts);
        bind(0, el, opts);
        var els = full ? $('body > .blockUI') : $('.blockUI', el);
        if (full) pageBlock = pageBlockEls = null;
        if (opts.fadeOut) {
            els.fadeOut(opts.fadeOut);
            setTimeout(function() {
                reset(els, data)
            },
            opts.fadeOut)
        } else reset(els, data)
    };
    function reset(els, data) {
        els.each(function(i, o) {
            if (this.parentNode) this.parentNode.removeChild(this)
        });
        if (data) {
            data.el.style.display = data.display;
            data.parent.appendChild(data.el);
            $(data.el).removeData('blockUI.history')
        }
    };
    function bind(b, el, opts) {
        var full = el == window,
        $el = $(el);
        if (!b && (full && !pageBlock || !full && !$el.data('blockUI.isBlocked'))) return;
        if (!full) $el.data('blockUI.isBlocked', b);
        var events = 'mousedown mouseup keydown keypress click';
        b ? $(document).bind(events, opts, handler) : $(document).unbind(events, handler)
    };
    function handler(e) {
        if (e.keyCode && e.keyCode == 9) {
            if (pageBlock && e.data.constrainTabKey) {
                var els = pageBlockEls;
                var fwd = !e.shiftKey && e.target == els[els.length - 1];
                var back = e.shiftKey && e.target == els[0];
                if (fwd || back) {
                    setTimeout(function() {
                        focus(back)
                    },
                    10);
                    return false
                }
            }
        }
        if ($(e.target).parents('div.blockMsg').length > 0) return true;
        return $(e.target).parents().children().filter('div.blockUI').length == 0
    };
    function focus(back) {
        if (!pageBlockEls) return;
        var e = pageBlockEls[back === true ? pageBlockEls.length - 1 : 0];
        if (e) e.focus()
    };
    function center(el, x, y) {
        var p = el.parentNode,
        s = el.style;
        var l = ((p.offsetWidth - el.offsetWidth) / 2) - sz(p, 'borderLeftWidth');
        var t = ((p.offsetHeight - el.offsetHeight) / 2) - sz(p, 'borderTopWidth');
        if (x) s.left = l > 0 ? (l + 'px') : '0';
        if (y) s.top = t > 0 ? (t + 'px') : '0'
    };
    function sz(el, p) {
        return parseInt($.css(el, p)) || 0
    }
})(jQuery);