/*******************************************************************************
*  ruthsarian_utilities.js : 2007.06.08
* -----------------------------------------------------------------------------
*  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. 
*******************************************************************************/

/* JS to trigger hover class for IE */

if ( ( typeof( sfHover ) ).toLowerCase() != 'undefined' ) { event_attach( 'onload' , function () { 
				sfHover( 'topmenu' );
} ); }

/* 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);
}



/* 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();
	}
}



/* 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.isIE && !browser.isIE7up )
	{
		var sfEls = document.getElementById( "main_nav" ).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" ), "" );
				}
			}
		}
	}
}