/*******************************************************************************
*  ruthsarian_utilities.js : 2008.01.22
* -----------------------------------------------------------------------------
*  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 to support both min and max widths, for readability 
 * and the 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;}
	set_width_limits(obj_name, min_width, '', ieOnly);
}
function set_width_limits(obj_name, min_width, max_width, ieOnly)
{
	if((typeof(ieOnly)).toLowerCase() == 'undefined')
	{
		ieOnly = true;
	}
	if (ieOnly == false || (document.getElementById && navigator.appVersion.indexOf("MSIE") > -1 && !window.opera))
	{
		document.set_width_obj_name = obj_name;
		document.min_width_size = min_width;
		document.max_width_size = max_width;
		document.resizing = false;
		event_attach('onload', control_width);
		event_attach('onresize', control_width);
	}
}
function control_width()
{
	var cw, minw, maxw, gs, pl, pr, ml, mr, br, bl, ad, theDiv = document.set_width_obj_name;
	var g = document.getElementById(theDiv);
	minw = parseInt(document.min_width_size);
	maxw = parseInt(document.max_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 <= minw)
		{
			minw -= ad;
			g.style.width = minw + "px";
		}
		else if(cw > maxw)
		{
			maxw -= ad;
			g.style.width = maxw + "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));
}

/*
// ///////////////////////////
// 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);
}