/*******************************************************************************
*  ruthsarian_utilities.js : 2007.08.03
* -----------------------------------------------------------------------------
*  A group of useful JavaScript utilities that can aid in the development
*  of webpages. Credit and source of code is given before each set of
*  functions. 
*******************************************************************************/

/* event_attach() takes care of attaching event handlers (functions) to events. 
 * this simplifies the process of attaching multiple handlers to a single event
 *
 * NOTE: the onload stack is executed in a LIFO manner to mimic 
 *       IE's window.attachEvent function. However, Opera also has its own
 *       window.attachEvent function which executes the onload stack in a 
 *       FIFO manner. FIFO is better, but IE has a larger user base, so
 *       LIFO is the way we go.
 */
function event_attach( event , func )
{
        if ( window.attachEvent )
        {
                window.attachEvent( event , func );
        }
        else
        {
                if ( ( typeof( func ) ).toLowerCase() != 'function' )
                {
                        return;
                }
                if ( ( typeof( document.event_handlers ) ).toLowerCase() == 'undefined' )
                {
                        document.event_handlers = new Array();
                }
                if ( ( typeof( document.event_handlers[ event ] ) ).toLowerCase() == 'undefined' )
                {
                        document.event_handlers[ event ] = new Array();
                }
                if ( ( typeof( eval( 'window.' + event ) ) ).toLowerCase() != 'function' )
                {
                        eval( 'window.' + event + ' = function () { if ( ( typeof( document.event_handlers[ \'' + event + '\' ] ) ).toLowerCase() != \'undefined\' ) { for ( i = document.event_handlers[ \'' + event + '\' ].length - 1 ; i >= 0  ; i-- ) { document.event_handlers[ \'' + event + '\' ][ i ](); } } } ' );
                }
                document.event_handlers[ event ][ document.event_handlers[ event ].length ] = func;
        }
}

/* Browser Detect  v2.1.6
 * documentation: http://www.dithered.com/javascript/browser_detect/index.html
 * license: http://creativecommons.org/licenses/by/1.0/
 * code by Chris Nott (chris[at]dithered[dot]com)
 *
 * modified to include Dreamcast
 */
function browser_detect() 
{
        var ua                  = navigator.userAgent.toLowerCase(); 
        this.isGecko            = (ua.indexOf('gecko') != -1 && ua.indexOf('safari') == -1);
        this.isAppleWebKit      = (ua.indexOf('applewebkit') != -1);
        this.isKonqueror        = (ua.indexOf('konqueror') != -1); 
        this.isSafari           = (ua.indexOf('safari') != - 1);
        this.isOmniweb          = (ua.indexOf('omniweb') != - 1);
        this.isDreamcast        = (ua.indexOf("dreamcast") != -1);
        this.isOpera            = (ua.indexOf('opera') != -1); 
        this.isIcab             = (ua.indexOf('icab') != -1); 
        this.isAol              = (ua.indexOf('aol') != -1); 
        this.isIE               = (ua.indexOf('msie') != -1 && !this.isOpera && (ua.indexOf('webtv') == -1)); 
        this.isMozilla          = (this.isGecko && ua.indexOf('gecko/') + 14 == ua.length);
        this.isFirebird         = (ua.indexOf('firebird/') != -1);
        this.isNS               = ((this.isGecko) ? (ua.indexOf('netscape') != -1) : ((ua.indexOf('mozilla') != -1) && !this.isOpera && !this.isSafari && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1)));
        this.isIECompatible     = ((ua.indexOf('msie') != -1) && !this.isIE);
        this.isNSCompatible     = ((ua.indexOf('mozilla') != -1) && !this.isNS && !this.isMozilla);
        this.geckoVersion       = ((this.isGecko) ? ua.substring((ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14)) : -1);
        this.equivalentMozilla  = ((this.isGecko) ? parseFloat(ua.substring(ua.indexOf('rv:') + 3)) : -1);
        this.appleWebKitVersion = ((this.isAppleWebKit) ? parseFloat(ua.substring(ua.indexOf('applewebkit/') + 12)) : -1);
        this.versionMinor       = parseFloat(navigator.appVersion); 
        if (this.isGecko && !this.isMozilla) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('/', ua.indexOf('gecko/') + 6) + 1));
        }
        else if (this.isMozilla) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('rv:') + 3));
        }
        else if (this.isIE && this.versionMinor >= 4) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('msie ') + 5));
        }
        else if (this.isKonqueror) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('konqueror/') + 10));
        }
        else if (this.isSafari) {
                this.versionMinor = parseFloat(ua.substring(ua.lastIndexOf('safari/') + 7));
        }
        else if (this.isOmniweb) {
                this.versionMinor = parseFloat(ua.substring(ua.lastIndexOf('omniweb/') + 8));
        }
        else if (this.isOpera) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('opera') + 6));
        }
        else if (this.isIcab) {
                this.versionMinor = parseFloat(ua.substring(ua.indexOf('icab') + 5));
        }
        this.versionMajor       = parseInt(this.versionMinor); 
        this.isDOM1             = (document.getElementById);
        this.isDOM2Event        = (document.addEventListener && document.removeEventListener);
        this.mode               = document.compatMode ? document.compatMode : 'BackCompat';
        this.isWin              = (ua.indexOf('win') != -1);
        this.isWin32            = (this.isWin && (ua.indexOf('95') != -1 || ua.indexOf('98') != -1 || ua.indexOf('nt') != -1 || ua.indexOf('win32') != -1 || ua.indexOf('32bit') != -1 || ua.indexOf('xp') != -1));
        this.isMac              = (ua.indexOf('mac') != -1);
        this.isUnix             = (ua.indexOf('unix') != -1 || ua.indexOf('sunos') != -1 || ua.indexOf('bsd') != -1 || ua.indexOf('x11') != -1)
        this.isLinux            = (ua.indexOf('linux') != -1);
        this.isNS4x             = (this.isNS && this.versionMajor == 4);
        this.isNS40x            = (this.isNS4x && this.versionMinor < 4.5);
        this.isNS47x            = (this.isNS4x && this.versionMinor >= 4.7);
        this.isNS4up            = (this.isNS && this.versionMinor >= 4);
        this.isNS6x             = (this.isNS && this.versionMajor == 6);
        this.isNS6up            = (this.isNS && this.versionMajor >= 6);
        this.isNS7x             = (this.isNS && this.versionMajor == 7);
        this.isNS7up            = (this.isNS && this.versionMajor >= 7);
        this.isIE4x             = (this.isIE && this.versionMajor == 4);
        this.isIE4up            = (this.isIE && this.versionMajor >= 4);
        this.isIE5x             = (this.isIE && this.versionMajor == 5);
        this.isIE55             = (this.isIE && this.versionMinor == 5.5);
        this.isIE5up            = (this.isIE && this.versionMajor >= 5);
        this.isIE6x             = (this.isIE && this.versionMajor == 6);
        this.isIE6up            = (this.isIE && this.versionMajor >= 6);
        this.isIE7x             = (this.isIE && this.versionMajor == 7);
        this.isIE7up            = (this.isIE && this.versionMajor >= 7);
        this.isIE4xMac          = (this.isIE4x && this.isMac);
}

/* Opacity Displayer, Version 1.0 - http://old.alistapart.com/stories/pngopacity/
 * Copyright Michael Lovitt, 6/2002.
 */
function opacity( strId , strPath , intWidth , intHeight , strClass , strAlt )
{       
        if ( document.pngAlpha )
        {
                document.write( '<div style="height:'+intHeight+'px;width:'+intWidth+'px;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\''+strPath+'.png\', sizingMethod=\'scale\')" id="'+strId+'" class="'+strClass+'"></div>' );
        }
        else if ( document.pngNormal )
        {
                document.write( '<img src="'+strPath+'.png" width="'+intWidth+'" height="'+intHeight+'" name="'+strId+'" border="0" class="'+strClass+'" alt="'+strAlt+'" />' );
        }
        else if ( document.layers )
        {
                return( '<img src="'+strPath+'.gif" width="'+intWidth+'" height="'+intHeight+'" name="'+strId+'" border="0" class="'+strClass+'" alt="'+strAlt+'" />' );
        }
        else
        {
                document.write( '<img src="'+strPath+'.gif" width="'+intWidth+'" height="'+intHeight+'" name="'+strId+'" border="0" class="'+strClass+'" alt="'+strAlt+'" />' );
        }
        return( '' );
}
function opacity_init()
{
        var browser = new browser_detect();
        document.pngAlpha = false;
        document.pngNormal = false;
        document.strExt = ".gif";

        if ( ( browser.isIE55 || browser.isIE6up ) && !browser.isIE7up && browser.isWin32 )
        {
                document.pngAlpha = true;
                document.strExt = ".png";
        }
        else if ( 
                        ( browser.isGecko ) || 
                        ( browser.isIE5up && browser.isMac ) || 
                        ( browser.isOpera && browser.isWin && browser.versionMajor >= 6 ) || 
                        ( browser.isOpera && browser.isUnix && browser.versionMajor >= 6 ) || 
                        ( browser.isOpera && browser.isMac && browser.versionMajor >= 5 ) || 
                        ( browser.isOmniweb && browser.versionMinor >= 3.1 ) || 
                        ( browser.isIcab && browser.versionMinor >= 1.9 ) || 
                        ( browser.isWebtv ) || 
                        ( browser.isDreamcast )  ||
                        ( browser.isIE7up )
                )
        {
                document.pngNormal = true;
                document.strExt = ".png";
        }
}

/* handler for Netscape Navigator clients that screw up the display
 * of CSS pages when reloaded
 */
function NN_reloadPage( init )
{
        if ( init == true ) with ( navigator )
        {
                if ( ( appName == "Netscape" ) && ( parseInt ( appVersion ) == 4 ) )
                {
                        document.NN_pgW = innerWidth;
                        document.NN_pgH = innerHeight;
                        event_attach ( 'onresize' , NN_reloadPage );
                }
        }
        else if ( innerWidth != document.NN_pgW || innerHeight != document.NN_pgH )
        {
                location.reload();
        }
}

/* Min Width v1.1.3 by PVII-www.projectseven.com
 * http://www.projectseven.com/tutorials/css/minwidth/index.htm
 *
 * modified for readability and ability to limit application to
 * IE only so CSS min-width property may be used by compliant
 * browsers.
 *
 * NOTE: horizontal spacing (margins, padding, borders) set in
 *       % values may cause IE to crash when using this script.
 *
 * ALSO: padding, margins, and borders on parents of the element
 *       you specify may result in IE getting suck in an infinite
 *       loop. Please be sure to check your layout before you 
 *       publish it!
 */
function set_min_width( obj_name , min_width , ieOnly )
{
        if ( ( typeof( ieOnly ) ).toLowerCase() == 'undefined' )
        {
                ieOnly = true;
        }
        if ( ieOnly == false || ( document.getElementById && navigator.appVersion.indexOf( "MSIE" ) > -1 && !window.opera ) )
        {
                document.min_width_obj_name = obj_name;
                document.min_width_size = min_width;
                document.resizing = false;
                event_attach( 'onload' , control_min_width );
                event_attach( 'onresize' , control_min_width );
        }
}
function control_min_width()
{
        var cw , w , pl , pr , ml , mr , br , bl , ad , theDiv = document.min_width_obj_name;
        var g = document.getElementById( theDiv );
        w = parseInt(document.min_width_size);
        if ( g && document.body && document.body.clientWidth )
        {
                gs = g.currentStyle;
                cw = parseInt( document.body.clientWidth );
                pl = parseInt( gs.paddingLeft );
                pr = parseInt( gs.paddingRight );
                ml = parseInt( gs.marginLeft );
                mr = parseInt( gs.marginRight );
                bl = parseInt( gs.borderLeftWidth );
                br = parseInt( gs.borderRightWidth );
                ml = ml ? ml : 0;
                mr = mr ? mr : 0;
                pl = pl ? pl : 0;
                pr = pr ? pr : 0;
                bl = bl ? bl : 0;
                br = br ? br : 0;
                ad = pl + pr + ml + mr + bl + br;
                if ( cw <= w )
                {
                        w -= ad;
                        g.style.width = w + "px";
                }
                else
                {
                        g.style.width = "auto";
                }
        }
}

/* Cookie API  v1.0.1
 * documentation: http://www.dithered.com/javascript/cookies/index.html
 * license: http://creativecommons.org/licenses/by/1.0/
 * code (mostly) by Chris Nott (chris[at]dithered[dot]com)
 */
function setCookie( name, value, expires, path, domain, secure )
{
         var curCookie = name + "=" + escape(value) +
                ((expires) ? "; expires=" + expires.toGMTString() : "") +
                ((path) ? "; path=" + path : "") +
                ((domain) ? "; domain=" + domain : "") +
                ((secure) ? "; secure" : "");
        document.cookie = curCookie;
}
function getCookie( name )
{
        var dc = document.cookie;
        var prefix = name + "=";
        var begin = dc.indexOf( "; " + prefix );
        if ( begin == -1 )
        {
                begin = dc.indexOf(prefix);
                if (begin != 0) return null;
        }
        else
        {
                begin += 2;
        }
        var end = document.cookie.indexOf( ";", begin );
        if ( end == -1 )
        {
                end = dc.length;
        }
        return unescape(dc.substring(begin + prefix.length, end));
}
function deleteCookie( name, path, domain )
{
        var value = getCookie( name );
        if ( value != null )
        {
                document.cookie = name + "=" + 
                        ((path) ? "; path=" + path : "") +
                        ((domain) ? "; domain=" + domain : "") +
                        "; expires=Thu, 01-Jan-70 00:00:01 GMT";
        }
        return value;
}

/* font size functions operate on the body element's
 * style and defines sizes in percentages. because
 * the default font size is set to 0 in the array,
 * the first value in the font_sizes array should
 * _ALWAYS_ be 100.
 *
 *      var font_sizes = new Array( 100, 110, 120 );
 *      var current_font_size = 0;
 *      event_attach( 'onload' , loadFontSize );
 */
function loadFontSize()
{
        current_font_size = parseInt( '0' + getCookie ( "font_size" ) );
        setFontSize ( current_font_size );
}
function setFontSize( size )
{
        if( size >= 0 && size < font_sizes.length )
        {
                current_font_size = size;
        }
        else if( ++current_font_size >= font_sizes.length )
        {
                current_font_size = 0;
        }
        if ( document.body )
        {
                document.body.style.fontSize = font_sizes[ current_font_size ] + '%';
                setCookie( "font_size" , current_font_size );
        }
}

/* standard trim function to remove leading and trailing 
 * whitespace from a given string
 */
function trim( str )
{
   return str.replace(/^\s*|\s*$/g,"");
}

/* stylesheets should be defined in the HTML via a LINK tag
 * and rel attribute set to "alternate stylesheet". the title
 * attribute is then set in the format of "title : group"
 * this function will disable all but the stylesheet specified
 * by title in the group specified by group.
 *
 * Based on code by Paul Sowden
 * http://www.alistapart.com/articles/alternate/
 *        
 */
function setActiveStyleSheet( title , group )
{
        var i, a, b, g, t;
        if ( !title || !group )
        {
                return;
        }
        for ( i = 0; ( a = document.getElementsByTagName( "link" )[ i ] ); i++ ) 
        {
                if ( a.getAttribute( "rel" ).indexOf( "style" ) != -1 && a.getAttribute( "title" ) )
                {
                        b = ( a.getAttribute( "title" ) ).split( ":" );
                        g = trim( b[ b.length - 1 ] );
                        if ( g.toLowerCase() == group.toLowerCase() )
                        {
                                a.disabled = true;
                                t = trim( ( a.getAttribute( "title" ) ).substring( 0, a.getAttribute( "title" ).length - b[ b.length - 1 ].length - 1 ) );
                                if( t.toLowerCase() == title.toLowerCase() )
                                {
                                        a.disabled = false;
                                }
                        }
                        setCookie( "style_" + g.toLowerCase() , title );
                }
        }
}
function getPreferredStylesheet ( group )
{
        return ( getCookie ( "style_" + group ) );
}

/* Son of Suckerfish Dropdowns w/Mac support and IFRAME matting
 * This attaches an event to each LI element so when the mouseover event triggers,
 * the element's class is altered to include (and remove on mouseout) an extra class.
 * We can then use that class, in conjunction with stylesheets, to trigger drop-down
 * menus that are (mostly) CSS-based.
 *
 * The second variable passed to sfHover (noMat), if set to true, will disable
 * the IFRAME matting used to hide form elements that peek through if the menu
 * appears over one. Use this option when there's no chance the menu will pop over
 * a form field as this will remove the lag/performance issues related to using
 * the IFRAME matting.
 *
 * Original:
 *      http://www.htmldog.com/articles/suckerfish/dropdowns/
 * Fixes to work with IE/Mac:
 *      http://carroll.org.uk/sandbox/suckerfish/bones2.html
 * IFRAME matting to handle hover over form elements: 
 *      http://homepage.mac.com/igstudio/design/ulsmenus/vertical-uls-iframe-2.html
 */
function sfHover ( objID, noMat )
{
        var browser = new browser_detect();
        if ( browser.isIE5up && !browser.isIE7up )
        {
                var sfEls = document.getElementById( objID ).getElementsByTagName( "LI" );
                for (var i=0; i<sfEls.length; i++)
                {
                        if ( !noMat && !browser.isMac && ( browser.isIE55 || browser.isIE6x ))
                        {
                                sfEls[i].onmouseover = function()
                                {
                                        this.className += ( this.className.length > 0 ? " " : "" ) + "sfhover";
                                        var ieUL = this.getElementsByTagName( "UL" )[0];
                                        if ( ieUL )
                                        {
                                                var ieMat = document.createElement( "IFRAME" );
                                                ieMat.style.width = ieUL.offsetWidth + "px";
                                                ieMat.style.height = ieUL.offsetHeight + "px";
                                                ieUL.insertBefore( ieMat, ieUL.firstChild );
                                                ieMat.style.zIndex = "-1";
                                        }
                                }
                                sfEls[i].onmouseout = function()
                                {
                                        this.className = this.className.replace( new RegExp( "( ?|^)sfhover\\b" ), "" );
                                        var ieUL = this.getElementsByTagName('ul')[0];
                                        if (ieUL)
                                        {
                                                ieUL.removeChild( ieUL.firstChild );
                                        }
                                }
                        }
                        else
                        {
                                sfEls[i].onmouseover = function()
                                {
                                        this.className += ( this.className.length > 0 ? " " : "" ) + "sfhover";
                                }
                                sfEls[i].onmouseout = function()
                                {
                                        this.className = this.className.replace( new RegExp( "( ?|^)sfhover\\b" ), "" );
                                }
                        }
                }
        }
}

/*
// ///////////////////////////
// isdefined v1.0
// 
// Check if a javascript variable has been defined.
// 
// Author : Jehiah Czebotar
// Website: http://www.jehiah.com
// Usage  : alert(isdefined('myvar'));
// ///////////////////////////
*/
function isDefined ( variable )
{
    return ( typeof( window[ variable ] ) == "undefined" ) ?  false : true;
}

/* pause()
 * modified form of code taken from:
 * http://www.sean.co.uk/a/webdesign/javascriptdelay.shtm
 */
function pause ( m )
{
        var date = new Date();
        var curDate = null;
        do 
        {
                curDate = new Date();
        }
        while (( curDate - date ) < m );
}