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// jQuery Alert Dialogs Plugin
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//
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// Version 1.1
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//
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// Cory S.N. LaViska
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// A Beautiful Site (http://abeautifulsite.net/)
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// 14 May 2009
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//
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// Visit http://abeautifulsite.net/notebook/87 for more information
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//
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// Usage:
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//                jAlert( message, [title, callback] )
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//                jConfirm( message, [title, callback] )
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//                jPrompt( message, [value, title, callback] )
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// 
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// History:
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//
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//                1.00 - Released (29 December 2008)
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//
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//                1.01 - Fixed bug where unbinding would destroy all resize events
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//
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// License:
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// 
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// This plugin is dual-licensed under the GNU General Public License and the MIT License and
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// is copyright 2008 A Beautiful Site, LLC. 
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//
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(function($) {
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        $.alerts = {
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                // These properties can be read/written by accessing $.alerts.propertyName from your scripts at any time
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                verticalOffset: -75,                // vertical offset of the dialog from center screen, in pixels
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                horizontalOffset: 0,                // horizontal offset of the dialog from center screen, in pixels/
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                repositionOnResize: true,           // re-centers the dialog on window resize
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                overlayOpacity: .01,                // transparency level of overlay
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                overlayColor: '#FFF',               // base color of overlay
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                draggable: true,                    // make the dialogs draggable (requires UI Draggables plugin)
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                okButton: ' OK ',         // text for the OK button
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                cancelButton: ' Cancel ', // text for the Cancel button
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                dialogClass: null,                  // if specified, this class will be applied to all dialogs
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                // Public methods
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                alert: function(message, title, callback) {
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                        if( title == null ) title = 'Alert';
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                        $.alerts._show(title, message, null, 'alert', function(result) {
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                                if( callback ) callback(result);
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                        });
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                },
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                confirm: function(message, title, callback) {
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                        if( title == null ) title = 'Confirm';
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                        $.alerts._show(title, message, null, 'confirm', function(result) {
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                                if( callback ) callback(result);
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                        });
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                },
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                prompt: function(message, value, title, callback) {
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                        if( title == null ) title = 'Prompt';
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                        $.alerts._show(title, message, value, 'prompt', function(result) {
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                                if( callback ) callback(result);
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                        });
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                },
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                // Private methods
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                _show: function(title, msg, value, type, callback) {
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                        $.alerts._hide();
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                        $.alerts._overlay('show');
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                        $("BODY").append(
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                          '<div id="popup_container">' +
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                            '<h1 id="popup_title"></h1>' +
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                            '<div id="popup_content">' +
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                              '<div id="popup_message"></div>' +
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                                '</div>' +
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                          '</div>');
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                        if( $.alerts.dialogClass ) $("#popup_container").addClass($.alerts.dialogClass);
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                        // IE6 Fix
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                        var pos = ($.browser.msie && parseInt($.browser.version) <= 6 ) ? 'absolute' : 'fixed'; 
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                        $("#popup_container").css({
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                                position: pos,
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                                zIndex: 99999,
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                                padding: 0,
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                                margin: 0
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                        });
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                        $("#popup_title").text(title);
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                        $("#popup_content").addClass(type);
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                        $("#popup_message").text(msg);
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                        $("#popup_message").html( $("#popup_message").text().replace(/\n/g, '<br />') );
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                        $("#popup_container").css({
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                                minWidth: $("#popup_container").outerWidth(),
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                                maxWidth: $("#popup_container").outerWidth()
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                        });
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                        $.alerts._reposition();
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                        $.alerts._maintainPosition(true);
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                        switch( type ) {
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                                case 'alert':
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                                        $("#popup_message").after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /></div>');
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                                        $("#popup_ok").click( function() {
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                                                $.alerts._hide();
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                                                callback(true);
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                                        });
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                                        $("#popup_ok").focus().keypress( function(e) {
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                                                if( e.keyCode == 13 || e.keyCode == 27 ) $("#popup_ok").trigger('click');
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                                        });
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                                break;
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                                case 'confirm':
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                                        $("#popup_message").after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" /></div>');
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                                        $("#popup_ok").click( function() {
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                                                $.alerts._hide();
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                                                if( callback ) callback(true);
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                                        });
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                                        $("#popup_cancel").click( function() {
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                                                $.alerts._hide();
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                                                if( callback ) callback(false);
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                                        });
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                                        $("#popup_ok").focus();
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                                        $("#popup_ok, #popup_cancel").keypress( function(e) {
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                                                if( e.keyCode == 13 ) $("#popup_ok").trigger('click');
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                                                if( e.keyCode == 27 ) $("#popup_cancel").trigger('click');
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                                        });
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                                break;
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                                case 'prompt':
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                                        $("#popup_message").append('<br /><input type="text" size="30" id="popup_prompt" />').after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" /></div>');
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                                        $("#popup_prompt").width( $("#popup_message").width() );
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                                        $("#popup_ok").click( function() {
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                                                var val = $("#popup_prompt").val();
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                                                $.alerts._hide();
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                                                if( callback ) callback( val );
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                                        });
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                                        $("#popup_cancel").click( function() {
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                                                $.alerts._hide();
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                                                if( callback ) callback( null );
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                                        });
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                                        $("#popup_prompt, #popup_ok, #popup_cancel").keypress( function(e) {
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                                                if( e.keyCode == 13 ) $("#popup_ok").trigger('click');
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                                                if( e.keyCode == 27 ) $("#popup_cancel").trigger('click');
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                                        });
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                                        if( value ) $("#popup_prompt").val(value);
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                                        $("#popup_prompt").focus().select();
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                                break;
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                        }
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                        // Make draggable
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                        if( $.alerts.draggable ) {
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                                try {
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                                        $("#popup_container").draggable({ handle: $("#popup_title") });
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                                        $("#popup_title").css({ cursor: 'move' });
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                                } catch(e) { /* requires jQuery UI draggables */ }
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                        }
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                },
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                _hide: function() {
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                        $("#popup_container").remove();
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                        $.alerts._overlay('hide');
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                        $.alerts._maintainPosition(false);
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                },
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                _overlay: function(status) {
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                        switch( status ) {
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                                case 'show':
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                                        $.alerts._overlay('hide');
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                                        $("BODY").append('<div id="popup_overlay"></div>');
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                                        $("#popup_overlay").css({
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                                                position: 'absolute',
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                                                zIndex: 99998,
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                                                top: '0px',
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                                                left: '0px',
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                                                width: '100%',
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                                                height: $(document).height(),
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                                                background: $.alerts.overlayColor,
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                                                opacity: $.alerts.overlayOpacity
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                                        });
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                                break;
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                                case 'hide':
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                                        $("#popup_overlay").remove();
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                                break;
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                        }
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                },
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                _reposition: function() {
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                        var top = (($(window).height() / 2) - ($("#popup_container").outerHeight() / 2)) + $.alerts.verticalOffset;
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                        var left = (($(window).width() / 2) - ($("#popup_container").outerWidth() / 2)) + $.alerts.horizontalOffset;
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                        if( top < 0 ) top = 0;
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                        if( left < 0 ) left = 0;
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                        // IE6 fix
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                        if( $.browser.msie && parseInt($.browser.version) <= 6 ) top = top + $(window).scrollTop();
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                        $("#popup_container").css({
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                                top: top + 'px',
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                                left: left + 'px'
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                        });
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                        $("#popup_overlay").height( $(document).height() );
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                },
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                _maintainPosition: function(status) {
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                        if( $.alerts.repositionOnResize ) {
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                                switch(status) {
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                                        case true:
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                                                $(window).bind('resize', $.alerts._reposition);
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                                        break;
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                                        case false:
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                                                $(window).unbind('resize', $.alerts._reposition);
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                                        break;
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                                }
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                        }
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                }
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        }
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        // Shortuct functions
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        jAlert = function(message, title, callback) {
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                $.alerts.alert(message, title, callback);
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        }
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        jConfirm = function(message, title, callback) {
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                $.alerts.confirm(message, title, callback);
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        };
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        jPrompt = function(message, value, title, callback) {
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                $.alerts.prompt(message, value, title, callback);
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        };
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})(jQuery);