function goToURL() { history.go(-1); }

function addbookmark()
{
  if (window.sidebar) {
    window.sidebar.addPanel(bookmarktitle, bookmarkurl,"");
  } else if( document.all ) {
    window.external.AddFavorite(bookmarkurl, bookmarktitle);
  } else if( window.opera && window.print ) {
    return true;
  }
}

/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: CodeLifter.com | http://www.codelifter.com */
var good;
function checkEmailAddress(field) {
var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
  if (goodEmail) {
    good = true;
  } else {
    alert('Please enter a valid e-mail address.');
    field.focus();
    field.select();
    good = false;
  }
}

function mailThisUrl() {
  good = false
  checkEmailAddress(document.eMailer.address);
  if (good) {

u = window.location;
m = "I thought this might interest you...";
    window.location = "mailto:"+document.eMailer.address.value+"?subject="+m+"&body="+document.title+" "+u;
  }
}


function checkFrame(){
if (parent.location.href == self.location.href) {
	window.location.href = 'index.html';
}
}

function setCookie( name, value, expires, path, domain, secure ) {
var today = new Date();
today.setTime( today.getTime() );
if ( expires ) {
expires = expires * 1000 * 60 * 60 * 24;
}
var expires_date = new Date( today.getTime() + (expires) );
document.cookie = name+"="+escape( value ) +
( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) +
( ( path ) ? ";path=" + path : "" ) +
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}
function getCookie( check_name ) {
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; 
	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		a_temp_cookie = a_all_cookies[i].split( '=' );
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');
	//	alert (check_name);
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found )
	{
		return null;
	}
}

function allez(showit,str1,itm){
if (showit) {
	alert(str1);
	itm.focus();
	}
}

function installSearchEngine() {
 if (window.external && ("AddSearchProvider" in window.external)) {
   window.external.AddSearchProvider("http://www.u1a.co.uk/IIS.xml");
 } else {
   alert("No search engine support");
 }
}

function resizeImg()
{
    // ========================
    // Customise these variables as you wish
    // ========================

    var _resizeWidth  = 100;
    var _resizeHeight = 100;
    var _resizeClass  = 'prodimg';

    var imgArray = document.getElementsByTagName( 'IMG' );
    for ( var i = 0; i < imgArray.length; i++ )
    {
        var imgObj = imgArray[i];
        
            
        if ( imgObj.className == _resizeClass )
        {
            if (imgObj.width > _resizeWidth || imgObj.height > _resizeHeight) {
				var w = imgObj.width;
				var h = imgObj.height;
				if (h/_resizeHeight > w/_resizeWidth){
					w = w * (_resizeHeight / h);
					h = _resizeHeight;
				} else {
					h = h * (_resizeWidth/ w);
					w = _resizeWidth;
				}
				
				
				imgObj.style.width = w + 'px';
				imgObj.style.height = h + 'px';
			}
        }
    }
}

/*
 * bubbletip
 *
 * Copyright (c) 2009, UhLeeKa
 * Version: 
 *      1.0.4
 * Licensed under the GPL license:
 *     http://www.gnu.org/licenses/gpl.html
 * Author Website: 
 *     http://www.uhleeka.com
 * Description: 
 *     A bubble-styled tooltip extension
 *      - multiple tips on a page
 *      - multiple tips per jQuery element 
 *      - tips open outward in four directions:
 *         - up
 *         - down
 *         - left
 *         - right
 *      - tips can be: 
 *         - anchored to the triggering jQuery element
 *         - absolutely positioned
 *         - opened at the current mouse coordinates
 *         - anchored to a specified jQuery element
 *      - IE png transparency is handled via filters
 */
; (function($) {
	var bindIndex = 0;
	$.fn.extend({
		bubbletip: function(tip, options) {
			// check to see if the tip is a descendant of 
			// a table.bubbletip element and therefore
			// has already been instantiated as a bubbletip
			if ($('table.bubbletip #' + $(tip).id).length > 0) {
				return this;
			}

			var _this, _tip, _options, _calc, _timeoutAnimate, _timeoutRefresh, _isActive, _isHiding, _wrapper, _bindIndex;

			_this = $(this);
			_tip = $(tip);
			_bindIndex = bindIndex++;  // for window.resize namespace binding
			_options = {
				positionAt: 'element', // element | body | mouse
				positionAtElement: _this,
				offsetTop: 0,
				offsetLeft: 0,
				deltaPosition: 30,
				deltaDirection: 'up', // direction: up | down | left | right
				animationDuration: 250,
				animationEasing: 'swing', // linear | swing
				bindShow: 'mouseover', // mouseover | focus | click | etc.
				bindHide: 'mouseout', // mouseout | blur | etc.
				delayShow: 0,
				delayHide: 500
			};
			if (options) {
				_options = $.extend(_options, options);
			}
			// calculated values
			_calc = {
				top: 0,
				left: 0,
				delta: 0,
				mouseTop: 0,
				mouseLeft: 0,
				tipHeight: 0,
				bindShow: (_options.bindShow + ' ').replace(/ +/g, '.bubbletip' + _bindIndex),
				bindHide: (_options.bindHide + ' ').replace(/ +/g, '.bubbletip' + _bindIndex)
			};
			_timeoutAnimate = null;
			_timeoutRefresh = null;
			_isActive = false;
			_isHiding = false;

			// store the tip id for removeBubbletip
			if (!_this.data('bubbletip_tips')) {
				_this.data('bubbletip_tips', [[_tip.get(0).id, _calc.bindShow, _calc.bindHide, _bindIndex]]);
			} else {
				_this.data('bubbletip_tips', $.merge(_this.data('bubbletip_tips'), [[_tip.get(0).id, _calc.bindShow, _calc.bindHide, _bindIndex]]));
			}


			// validate _options
			if (!_options.positionAt.match(/^element|body|mouse$/i)) {
				_options.positionAt = 'element';
			}
			if (!_options.deltaDirection.match(/^up|down|left|right$/i)) {
				_options.deltaDirection = 'up';
			}

			// create the wrapper table element
			if (_options.deltaDirection.match(/^up$/i)) {
				_wrapper = $('<table class="bubbletip" cellspacing="0" cellpadding="0"><tbody><tr><td class="bt-topleft"></td><td class="bt-top"></td><td class="bt-topright"></td></tr><tr><td class="bt-left"></td><td class="bt-content"></td><td class="bt-right"></td></tr><tr><td class="bt-bottomleft"></td><td><table class="bt-bottom" cellspacing="0" cellpadding="0"><tr><th></th><td><div></div></td><th></th></tr></table></td><td class="bt-bottomright"></td></tr></tbody></table>');
			} else if (_options.deltaDirection.match(/^down$/i)) {
				_wrapper = $('<table class="bubbletip" cellspacing="0" cellpadding="0"><tbody><tr><td class="bt-topleft"></td><td><table class="bt-top" cellspacing="0" cellpadding="0"><tr><th></th><td><div></div></td><th></th></tr></table></td><td class="bt-topright"></td></tr><tr><td class="bt-left"></td><td class="bt-content"></td><td class="bt-right"></td></tr><tr><td class="bt-bottomleft"></td><td class="bt-bottom"></td><td class="bt-bottomright"></td></tr></tbody></table>');
			} else if (_options.deltaDirection.match(/^left$/i)) {
				_wrapper = $('<table class="bubbletip" cellspacing="0" cellpadding="0"><tbody><tr><td class="bt-topleft"></td><td class="bt-top"></td><td class="bt-topright"></td></tr><tr><td class="bt-left"></td><td class="bt-content"></td><td class="bt-right-tail"><div class="bt-right"></div><div class="bt-right-tail"></div><div class="bt-right"></div></td></tr><tr><td class="bt-bottomleft"></td><td class="bt-bottom"></td><td class="bt-bottomright"></td></tr></tbody></table>');
			} else if (_options.deltaDirection.match(/^right$/i)) {
				_wrapper = $('<table class="bubbletip" cellspacing="0" cellpadding="0"><tbody><tr><td class="bt-topleft"></td><td class="bt-top"></td><td class="bt-topright"></td></tr><tr><td class="bt-left-tail"><div class="bt-left"></div><div class="bt-left-tail"></div><div class="bt-left"></div></td><td class="bt-content"></td><td class="bt-right"></td></tr><tr><td class="bt-bottomleft"></td><td class="bt-bottom"></td><td class="bt-bottomright"></td></tr></tbody></table>');
			}

			// append the wrapper to the document body
			_wrapper.appendTo('body');

			// apply IE filters to _wrapper elements
			if ((/msie/.test(navigator.userAgent.toLowerCase())) && (!/opera/.test(navigator.userAgent.toLowerCase()))) {
				$('*', _wrapper).each(function() {
					var image = $(this).css('background-image');
					if (image.match(/^url\(["']?(.*\.png)["']?\)$/i)) {
						image = RegExp.$1;
						$(this).css({
							'backgroundImage': 'none',
							'filter': 'progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=' + ($(this).css('backgroundRepeat') == 'no-repeat' ? 'crop' : 'scale') + ', src=\'' + image + '\')'
						}).each(function() {
							var position = $(this).css('position');
							if (position != 'absolute' && position != 'relative')
								$(this).css('position', 'relative');
						});
					}
				});
			}

			// move the tip element into the content section of the wrapper
			$('.bt-content', _wrapper).append(_tip);
			// show the tip (in case it is hidden) so that we can calculate its dimensions
			_tip.show();
			// handle left|right delta
			if (_options.deltaDirection.match(/^left|right$/i)) {
				// tail is 40px, so divide height by two and subtract 20px;
				_calc.tipHeight = parseInt(_tip.height() / 2);
				// handle odd integer height
				if ((_tip.height() % 2) == 1) {
					_calc.tipHeight++;
				}
				_calc.tipHeight = (_calc.tipHeight < 20) ? 1 : _calc.tipHeight - 20;
				if (_options.deltaDirection.match(/^left$/i)) {
					$('div.bt-right', _wrapper).css('height', _calc.tipHeight + 'px');
				} else {
					$('div.bt-left', _wrapper).css('height', _calc.tipHeight + 'px');
				}
			}
			// set the opacity of the wrapper to 0
			_wrapper.css('opacity', 0);
			// execute initial calculations
			_Calculate();

			// handle window.resize
			$(window).bind('resize.bubbletip' + _bindIndex, function() {
				if (_timeoutRefresh) {
					clearTimeout(_timeoutRefresh);
				} else {
					_wrapper.hide();
				}
				_timeoutRefresh = setTimeout(function() {
					_Calculate();
				}, 250);
			});

			// handle mouseover and mouseout events
			$([_wrapper.get(0), this.get(0)]).bind(_calc.bindShow, function(e) {
				if (_timeoutAnimate) {
					clearTimeout(_timeoutAnimate);
				}
				_timeoutAnimate = setTimeout(function() {
					if (_isActive) {
						return;
					}
					_isActive = true;
					if (_isHiding) {
						_wrapper.stop(true, false);
					}

					var animation;

					if (_options.positionAt.match(/^element|body$/i)) {
						if (_options.deltaDirection.match(/^up|down$/i)) {
							if (!_isHiding) {
								_wrapper.css('top', parseInt(_calc.top + _calc.delta) + 'px');
							}
							animation = { 'opacity': 1, 'top': _calc.top + 'px' };
						} else {
							if (!_isHiding) {
								_wrapper.css('left', parseInt(_calc.left + _calc.delta) + 'px');
							}
							animation = { 'opacity': 1, 'left': _calc.left + 'px' };
						}
					} else {
						if (_options.deltaDirection.match(/^up|down$/i)) {
							if (!_isHiding) {
								_calc.mouseTop = e.pageY + _calc.top;
								_wrapper.css({ 'top': parseInt(_calc.mouseTop + _calc.delta) + 'px', 'left': parseInt(e.pageX - (_wrapper.width() / 2)) + 'px' });
							}
							animation = { 'opacity': 1, 'top': _calc.mouseTop + 'px' };
						} else {
							if (!_isHiding) {
								_calc.mouseLeft = e.pageX + _calc.left;
								_wrapper.css({ 'left': parseInt(_calc.mouseLeft + _calc.delta) + 'px', 'top': parseInt(e.pageY - (_wrapper.height() / 2)) + 'px' });
							}
							animation = { 'opacity': 1, 'left': _calc.left + 'px' };
						}
					}
					_isHiding = false;
					_wrapper.show();
					_wrapper.animate(animation, _options.animationDuration, _options.animationEasing, function() {
						_wrapper.css('opacity', '');
						_isActive = true;
					});
				}, _options.delayShow);

				return false;
			}).bind(_calc.bindHide, function() {
				if (_timeoutAnimate) {
					clearTimeout(_timeoutAnimate);
				}
				_timeoutAnimate = setTimeout(function() {
					var animation;

					_isActive = false;
					_isHiding = true;
					if (_options.positionAt.match(/^element|body$/i)) {
						if (_options.deltaDirection.match(/^up|down$/i)) {
							animation = { 'opacity': 0, 'top': parseInt(_calc.top - _calc.delta) + 'px' };
						} else {
							animation = { 'opacity': 0, 'left': parseInt(_calc.left - _calc.delta) + 'px' };
						}
					} else {
						if (_options.deltaDirection.match(/^up|down$/i)) {
							animation = { 'opacity': 0, 'top': parseInt(_calc.mouseTop - _calc.delta) + 'px' };
						} else {
							animation = { 'opacity': 0, 'left': parseInt(_calc.mouseLeft - _calc.delta) + 'px' };
						}
					}
					_wrapper.animate(animation, _options.animationDuration, _options.animationEasing, function() {
						_wrapper.hide();
						_isHiding = false;
					});

				}, _options.delayHide);

				return false;
			});

			function _Calculate() {
				// calculate values
				if (_options.positionAt.match(/^element$/i)) {
					var offset = _options.positionAtElement.offset();
					if (_options.deltaDirection.match(/^up$/i)) {
						_calc.top = offset.top + _options.offsetTop - _wrapper.height();
						_calc.left = offset.left + _options.offsetLeft + ((_options.positionAtElement.width() - _wrapper.width()) / 2);
						_calc.delta = _options.deltaPosition;
					} else if (_options.deltaDirection.match(/^down$/i)) {
						_calc.top = offset.top + _options.positionAtElement.height() + _options.offsetTop;
						_calc.left = offset.left + _options.offsetLeft + ((_options.positionAtElement.width() - _wrapper.width()) / 2);
						_calc.delta = -_options.deltaPosition;
					} else if (_options.deltaDirection.match(/^left$/i)) {
						_calc.top = offset.top + _options.offsetTop + ((_options.positionAtElement.height() - _wrapper.height()) / 2);
						_calc.left = offset.left + _options.offsetLeft - _wrapper.width();
						_calc.delta = _options.deltaPosition;
					} else if (_options.deltaDirection.match(/^right$/i)) {
						_calc.top = offset.top + _options.offsetTop + ((_options.positionAtElement.height() - _wrapper.height()) / 2);
						_calc.left = offset.left + _options.positionAtElement.width() + _options.offsetLeft;
						_calc.delta = -_options.deltaPosition;
					}
				} else if (_options.positionAt.match(/^body$/i)) {
					if (_options.deltaDirection.match(/^up|left$/i)) {
						_calc.top = _options.offsetTop;
						_calc.left = _options.offsetLeft;
						// up or left
						_calc.delta = _options.deltaPosition;
					} else {
						if (_options.deltaDirection.match(/^down$/i)) {
							_calc.top = parseInt(_options.offsetTop + _wrapper.height());
							_calc.left = _options.offsetLeft;
						} else {
							_calc.top = _options.offsetTop;
							_calc.left = parseInt(_options.offsetLeft + _wrapper.width());
						}
						// down or right
						_calc.delta = -_options.deltaPosition;
					}
				} else if (_options.positionAt.match(/^mouse$/i)) {
					if (_options.deltaDirection.match(/^up|left$/i)) {
						if (_options.deltaDirection.match(/^up$/i)) {
							_calc.top = -(_options.offsetTop + _wrapper.height());
							_calc.left = _options.offsetLeft;
						} else if (_options.deltaDirection.match(/^left$/i)) {
							_calc.top = _options.offsetTop;
							_calc.left = -(_options.offsetLeft + _wrapper.width());
						}
						// up or left
						_calc.delta = _options.deltaPosition;
					} else {
						_calc.top = _options.offsetTop;
						_calc.left = _options.offsetLeft;
						// down or right
						_calc.delta = -_options.deltaPosition;
					}
				}
				// hide
				_wrapper.hide();
				// handle the wrapper (element|body) positioning
				if (_options.positionAt.match(/^element|body$/i)) {
					_wrapper.css({
						'position': 'absolute',
						'top': _calc.top + 'px',
						'left': _calc.left + 'px'
					});
				}
			};
			return this;
		},
		removeBubbletip: function(tips) {
			var tipsActive;
			var tipsToRemove = new Array();
			var arr, i, ix;
			var elem;

			tipsActive = $.makeArray($(this).data('bubbletip_tips'));

			// convert the parameter array of tip id's or elements to id's
			arr = $.makeArray(tips);
			for (i = 0; i < arr.length; i++) {
				tipsToRemove.push($(arr[i]).get(0).id);
			}

			for (i = 0; i < tipsActive.length; i++) {
				ix = null;
				if ((tipsToRemove.length == 0) || ((ix = $.inArray(tipsActive[i][0], tipsToRemove)) >= 0)) {
					// remove all tips if there are none specified
					// otherwise, remove only specified tips

					// find the surrounding table.bubbletip
					elem = $('#' + tipsActive[i][0]).get(0).parentNode;
					while (elem.tagName.toLowerCase() != 'table') {
						elem = elem.parentNode;
					}
					// attach the tip element to body and hide
					$(tipsActive[i][0]).appendTo('body').hide();
					// remove the surrounding table.bubbletip
					$(elem).remove();

					// unbind show/hide events
					$(this).unbind(tipsActive[i][1]).unbind([i][2]);

					// unbind window.resize event
					$(window).unbind('resize.bubbletip' + tipsActive[i][3]);
				}
			}

			return this;
		}
	});
})(jQuery);

/*
 * jQuery Tooltip plugin 1.3
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
 * http://docs.jquery.com/Plugins/Tooltip
 *
 * Copyright (c) 2006 - 2008 Jörn Zaefferer
 *
 * $Id: jquery.tooltip.js 5741 2008-06-21 15:22:16Z joern.zaefferer $
 * 
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
 
;(function($) {
	
		// the tooltip element
	var helper = {},
		// the current tooltipped element
		current,
		// the title of the current element, used for restoring
		title,
		// timeout id for delayed tooltips
		tID,
		// IE 5.5 or 6
		IE = $.browser.msie && /MSIE\s(5\.5|6\.)/.test(navigator.userAgent),
		// flag for mouse tracking
		track = false;
	
	$.tooltip = {
		blocked: false,
		defaults: {
			delay: 200,
			fade: false,
			showURL: true,
			extraClass: "",
			top: 15,
			left: 15,
			id: "tooltip"
		},
		block: function() {
			$.tooltip.blocked = !$.tooltip.blocked;
		}
	};
	
	$.fn.extend({
		tooltip: function(settings) {
			settings = $.extend({}, $.tooltip.defaults, settings);
			createHelper(settings);
			return this.each(function() {
					$.data(this, "tooltip", settings);
					this.tOpacity = helper.parent.css("opacity");
					// copy tooltip into its own expando and remove the title
					this.tooltipText = this.title;
					$(this).removeAttr("title");
					// also remove alt attribute to prevent default tooltip in IE
					this.alt = "";
				})
				.mouseover(save)
				.mouseout(hide)
				.click(hide);
		},
		fixPNG: IE ? function() {
			return this.each(function () {
				var image = $(this).css('backgroundImage');
				if (image.match(/^url\(["']?(.*\.png)["']?\)$/i)) {
					image = RegExp.$1;
					$(this).css({
						'backgroundImage': 'none',
						'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
					}).each(function () {
						var position = $(this).css('position');
						if (position != 'absolute' && position != 'relative')
							$(this).css('position', 'relative');
					});
				}
			});
		} : function() { return this; },
		unfixPNG: IE ? function() {
			return this.each(function () {
				$(this).css({'filter': '', backgroundImage: ''});
			});
		} : function() { return this; },
		hideWhenEmpty: function() {
			return this.each(function() {
				$(this)[ $(this).html() ? "show" : "hide" ]();
			});
		},
		url: function() {
			return this.attr('href') || this.attr('src');
		}
	});
	
	function createHelper(settings) {
		// there can be only one tooltip helper
		if( helper.parent )
			return;
		// create the helper, h3 for title, div for url
		helper.parent = $('<div id="' + settings.id + '"><h3></h3><div class="body"></div><div class="url"></div></div>')
			// add to document
			.appendTo(document.body)
			// hide it at first
			.hide();
			
		// apply bgiframe if available
		if ( $.fn.bgiframe )
			helper.parent.bgiframe();
		
		// save references to title and url elements
		helper.title = $('h3', helper.parent);
		helper.body = $('div.body', helper.parent);
		helper.url = $('div.url', helper.parent);
	}
	
	function settings(element) {
		return $.data(element, "tooltip");
	}
	
	// main event handler to start showing tooltips
	function handle(event) {
		// show helper, either with timeout or on instant
		if( settings(this).delay )
			tID = setTimeout(show, settings(this).delay);
		else
			show();
		
		// if selected, update the helper position when the mouse moves
		track = !!settings(this).track;
		$(document.body).bind('mousemove', update);
			
		// update at least once
		update(event);
	}
	
	// save elements title before the tooltip is displayed
	function save() {
		// if this is the current source, or it has no title (occurs with click event), stop
		if ( $.tooltip.blocked || this == current || (!this.tooltipText && !settings(this).bodyHandler) )
			return;

		// save current
		current = this;
		title = this.tooltipText;
		
		if ( settings(this).bodyHandler ) {
			helper.title.hide();
			var bodyContent = settings(this).bodyHandler.call(this);
			if (bodyContent.nodeType || bodyContent.jquery) {
				helper.body.empty().append(bodyContent)
			} else {
				helper.body.html( bodyContent );
			}
			helper.body.show();
		} else if ( settings(this).showBody ) {
			var parts = title.split(settings(this).showBody);
			helper.title.html(parts.shift()).show();
			helper.body.empty();
			for(var i = 0, part; (part = parts[i]); i++) {
				if(i > 0)
					helper.body.append("<br/>");
				helper.body.append(part);
			}
			helper.body.hideWhenEmpty();
		} else {
			helper.title.html(title).show();
			helper.body.hide();
		}
		
		// if element has href or src, add and show it, otherwise hide it
		if( settings(this).showURL && $(this).url() )
			helper.url.html( $(this).url().replace('http://', '') ).show();
		else 
			helper.url.hide();
		
		// add an optional class for this tip
		helper.parent.addClass(settings(this).extraClass);

		// fix PNG background for IE
		if (settings(this).fixPNG )
			helper.parent.fixPNG();
			
		handle.apply(this, arguments);
	}
	
	// delete timeout and show helper
	function show() {
		tID = null;
		if ((!IE || !$.fn.bgiframe) && settings(current).fade) {
			if (helper.parent.is(":animated"))
				helper.parent.stop().show().fadeTo(settings(current).fade, current.tOpacity);
			else
				helper.parent.is(':visible') ? helper.parent.fadeTo(settings(current).fade, current.tOpacity) : helper.parent.fadeIn(settings(current).fade);
		} else {
			helper.parent.show();
		}
		update();
	}
	
	/**
	 * callback for mousemove
	 * updates the helper position
	 * removes itself when no current element
	 */
	function update(event)	{
		if($.tooltip.blocked)
			return;
		
		if (event && event.target.tagName == "OPTION") {
			return;
		}
		
		// stop updating when tracking is disabled and the tooltip is visible
		if ( !track && helper.parent.is(":visible")) {
			$(document.body).unbind('mousemove', update)
		}
		
		// if no current element is available, remove this listener
		if( current == null ) {
			$(document.body).unbind('mousemove', update);
			return;	
		}
		
		// remove position helper classes
		helper.parent.removeClass("viewport-right").removeClass("viewport-bottom");
		
		var left = helper.parent[0].offsetLeft;
		var top = helper.parent[0].offsetTop;
		if (event) {
			// position the helper 15 pixel to bottom right, starting from mouse position
			left = event.pageX + settings(current).left;
			top = event.pageY + settings(current).top;
			var right='auto';
			if (settings(current).positionLeft) {
				right = $(window).width() - left;
				left = 'auto';
			}
			helper.parent.css({
				left: left,
				right: right,
				top: top
			});
		}
		
		var v = viewport(),
			h = helper.parent[0];
		// check horizontal position
		if (v.x + v.cx < h.offsetLeft + h.offsetWidth) {
			left -= h.offsetWidth + 20 + settings(current).left;
			helper.parent.css({left: left + 'px'}).addClass("viewport-right");
		}
		// check vertical position
		if (v.y + v.cy < h.offsetTop + h.offsetHeight) {
			top -= h.offsetHeight + 20 + settings(current).top;
			helper.parent.css({top: top + 'px'}).addClass("viewport-bottom");
		}
	}
	
	function viewport() {
		return {
			x: $(window).scrollLeft(),
			y: $(window).scrollTop(),
			cx: $(window).width(),
			cy: $(window).height()
		};
	}
	
	// hide helper and restore added classes and the title
	function hide(event) {
		if($.tooltip.blocked)
			return;
		// clear timeout if possible
		if(tID)
			clearTimeout(tID);
		// no more current element
		current = null;
		
		var tsettings = settings(this);
		function complete() {
			helper.parent.removeClass( tsettings.extraClass ).hide().css("opacity", "");
		}
		if ((!IE || !$.fn.bgiframe) && tsettings.fade) {
			if (helper.parent.is(':animated'))
				helper.parent.stop().fadeTo(tsettings.fade, 0, complete);
			else
				helper.parent.stop().fadeOut(tsettings.fade, complete);
		} else
			complete();
		
		if( settings(this).fixPNG )
			helper.parent.unfixPNG();
	}
	
})(jQuery);