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;
	}
}

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);
}



function setCookie( name, value, expires, path, domain, secure )
{
                expireDate = new Date; 
                expireDate.setMonth(expireDate.getMonth()+6); 
	 var curCookie = name + "=" + escape(value) +
		((expireDate) ? "; expires=" + expireDate.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;
}

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 );
	}
}

function isDefined ( variable )
{
    return ( typeof( window[ variable ] ) == "undefined" ) ?  false : true;
}