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/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 *              http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 *              http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fck_dialog_common.js
 *      Useful functions used by almost all dialog window pages.
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// Gets a element by its Id. Used for shorter coding.
function GetE( elementId )
{
        return document.getElementById( elementId )  ;
}

function ShowE( element, isVisible )
{
        if ( typeof( element ) == 'string' )
                element = GetE( element ) ;
        element.style.display = isVisible ? '' : 'none' ;
}

function SetAttribute( element, attName, attValue )
{
        if ( attValue == null || attValue.length == 0 )
                element.removeAttribute( attName, 0 ) ;                 // 0 : Case Insensitive
        else
                element.setAttribute( attName, attValue, 0 ) ;  // 0 : Case Insensitive
}

function GetAttribute( element, attName, valueIfNull )
{
        var oAtt = element.attributes[attName] ;

        if ( oAtt == null || !oAtt.specified )
                return valueIfNull ? valueIfNull : '' ;

        var oValue ;
        
        if ( !( oValue = element.getAttribute( attName, 2 ) ) )
                oValue = oAtt.nodeValue ;

        return ( oValue == null ? valueIfNull : oValue ) ;
}

// Functions used by text fiels to accept numbers only.
function IsDigit( e )
{
        if ( !e )
                e = event ;

        var iCode = ( e.keyCode || e.charCode ) ;
        
        return (
                        ( iCode >= 48 && iCode <= 57 )          // Numbers
                        || (iCode >= 37 && iCode <= 40)         // Arrows
                        || iCode == 8                                           // Backspace
                        || iCode == 46                                          // Delete
        ) ;
}

String.prototype.trim = function()
{
        return this.replace( /(^\s*)|(\s*$)/g, '' ) ;
}

String.prototype.startsWith = function( value )
{
        return ( this.substr( 0, value.length ) == value ) ;
}

String.prototype.remove = function( start, length )
{
        var s = '' ;

        if ( start > 0 )
                s = this.substring( 0, start ) ;

        if ( start + length < this.length )
                s += this.substring( start + length , this.length ) ;

        return s ;
}

String.prototype.ReplaceAll = function( searchArray, replaceArray )
{
        var replaced = this ;
        
        for ( var i = 0 ; i < searchArray.length ; i++ )
        {
                replaced = replaced.replace( searchArray[i], replaceArray[i] ) ;
        }
        
        return replaced ;
}

function OpenFileBrowser( url, width, height )
{
        // oEditor must be defined.
        
        var iLeft = ( oEditor.FCKConfig.ScreenWidth  - width ) / 2 ;
        var iTop  = ( oEditor.FCKConfig.ScreenHeight - height ) / 2 ;

        var sOptions = "toolbar=no,status=no,resizable=yes,dependent=yes,scrollbars=yes" ;
        sOptions += ",width=" + width ;
        sOptions += ",height=" + height ;
        sOptions += ",left=" + iLeft ;
        sOptions += ",top=" + iTop ;

        // The "PreserveSessionOnFileBrowser" because the above code could be 
        // blocked by popup blockers.
        if ( oEditor.FCKConfig.PreserveSessionOnFileBrowser && oEditor.FCKBrowserInfo.IsIE )
        {
                // The following change has been made otherwise IE will open the file 
                // browser on a different server session (on some cases):
                // http://support.microsoft.com/default.aspx?scid=kb;en-us;831678
                // by Simone Chiaretta.
                var oWindow = oEditor.window.open( url, 'FCKBrowseWindow', sOptions ) ;
                
                if ( oWindow )
                {
                        // Detect Yahoo popup blocker.
                        try
                        {
                                var sTest = oWindow.name ; // Yahoo returns "something", but we can't access it, so detect that and avoid strange errors for the user.
                                oWindow.opener = window ;
                        }
                        catch(e)
                        {
                                alert( oEditor.FCKLang.BrowseServerBlocked ) ;
                        }
                }
                else
                        alert( oEditor.FCKLang.BrowseServerBlocked ) ;
    }
    else
                window.open( url, 'FCKBrowseWindow', sOptions ) ;
}