/*
 +-------------------------------------------------------------------+
 |                   J S - T O O L T I P   (v2.2)                    |
 |                                                                   |
 | Copyright Gerd Tentler               www.gerd-tentler.de/tools    |
 | Created: Feb. 15, 2005               Last modified: Feb. 22, 2009 |
 +-------------------------------------------------------------------+
 | This program may be used and hosted free of charge by anyone for  |
 | personal purpose as long as this copyright notice remains intact. |
 |                                                                   |
 | Obtain permission before selling the code for this program or     |
 | hosting this software on a commercial website or redistributing   |
 | this software over the Internet or in any other medium. In all    |
 | cases copyright must remain intact.                               |
 +-------------------------------------------------------------------+

======================================================================================================

 This script was tested with the following systems and browsers:

 - Windows XP: IE 6, NN 7, Opera 7 + 9, Firefox 2
 - Mac OS X:   IE 5, Safari 1

 If you use another browser or system, this script may not work for you - sorry.

------------------------------------------------------------------------------------------------------

 USAGE:

 Use the toolTip-function with mouse-over and mouse-out events (see example below).

 - To show a tooltip, use this syntax: toolTip(text, width in pixels, opacity in percent)
	 Note: width and opacity are optional. Opacity is not supported by all browsers.

 - To hide a tooltip, use this syntax: toolTip()

------------------------------------------------------------------------------------------------------

 EXAMPLE:

 <a href="#" onMouseOver="toolTip('Just a test', 150)" onMouseOut="toolTip()">some text here</a>

======================================================================================================
*/

var OP = (navigator.userAgent.indexOf('Opera') != -1);
var IE = (navigator.userAgent.indexOf('MSIE') != -1 && !OP);
var GK = (navigator.userAgent.indexOf('Gecko') != -1);
var SA = (navigator.userAgent.indexOf('Safari') != -1);
var DOM = document.getElementById;

var tooltip = null;

function TOOLTIP() {
//----------------------------------------------------------------------------------------------------
// Configuration
//----------------------------------------------------------------------------------------------------
	this.width = 145;                     // width (pixels)
	this.bgColor = "#E1DDDA";             // background color
	this.textFont = "Verdana";            // text font family
	this.textSize = 12;                   // text font size (pixels)
	this.textColor = "#FF0000";           // text color
	this.border = "1px solid #FF0000";   // border (CSS spec: size style color, e.g. "1px solid #D00000")
	this.opacity = 80;                    // opacity (0 - 100); not supported by all browsers
	this.cursorDistance = 13;              // distance from mouse cursor (pixels)
	this.xPos = 'right';                  // horizontal position: "left" or "right"
	this.yPos = 'bottom';                 // vertical position: "top" or "bottom"
	this.padding = 3;                     // spazio tra ext e txt

	// don't change
	this.text = '';
	this.height = 0;
	this.obj = null;
	this.active = false;

//----------------------------------------------------------------------------------------------------
// Methods
//----------------------------------------------------------------------------------------------------
	this.create = function() {
		if(!this.obj) this.init();

		var s = (this.textFont ? 'font-family:' + this.textFont + '; ' : '') +
						(this.textSize ? 'font-size:' + this.textSize + 'px; ' : '') +
						(this.border ? 'border:' + this.border + '; ' : '') +
						(this.textColor ? 'color:' + this.textColor + '; ' : '');

		var t = '<table border=0 cellspacing=0 cellpadding='+this.padding+' width=' + this.width + '><tr>' +
						'<td align=center' + (s ? ' style="' + s + '"' : '') + '>' + this.text +
						'</td></tr></table>';

		if(DOM || IE) this.obj.innerHTML = t;
		if(DOM) this.height = this.obj.offsetHeight;
		else if(IE) this.height = this.obj.style.pixelHeight;
		if(this.bgColor) this.obj.style.backgroundColor = this.bgColor;

		this.setOpacity();
		this.move();
		this.show();
	}

	this.init = function() {
		if(DOM) this.obj = document.getElementById('ToolTip');
		else if(IE) this.obj = document.all.ToolTip;
	}

	this.move = function() {
		var winX = getWinX() - (((GK && !SA) || OP) ? 17 : 0);
		var winY = getWinY() - (((GK && !SA) || OP) ? 17 : 0);
		var x = mouseX;
		var y = mouseY;

		if(this.xPos == 'left') {
			if(x - this.width - this.cursorDistance >= getScrX())
				x -= this.width + this.cursorDistance;
			else x += this.cursorDistance;
		}
		else {
			if(x + this.width + this.cursorDistance > winX + getScrX())
				x -= this.width + this.cursorDistance;
			else x += this.cursorDistance;
		}

		if(this.yPos == 'top') {
			if(y - this.height - this.cursorDistance >= getScrY())
				y -= this.height + this.cursorDistance;
			else y += this.cursorDistance;
		}
		else {
			if(y + this.height + this.cursorDistance > winY + getScrY())
				y -= this.height;
			else y += this.cursorDistance;
		}

		this.obj.style.left = x + 'px';
		this.obj.style.top = y + 'px';
	}

	this.show = function() {
		this.obj.style.zIndex = 69;
		this.active = true;
		this.obj.style.visibility = 'visible';
	}

	this.hide = function() {
		this.obj.style.zIndex = -1;
		this.active = false;
		this.obj.style.visibility = 'hidden';
	}

	this.setOpacity = function() {
		this.obj.style.opacity = this.opacity / 100;
		this.obj.style.MozOpacity = this.opacity / 100;
		this.obj.style.KhtmlOpacity = this.opacity / 100;
		this.obj.style.filter = 'alpha(opacity=' + this.opacity + ')';
	}
}

//----------------------------------------------------------------------------------------------------
// Global functions
//----------------------------------------------------------------------------------------------------
function getScrX() {
	var offset = 0;
	if(window.pageXOffset)
		offset = window.pageXOffset;
	else if(document.documentElement && document.documentElement.scrollLeft)
		offset = document.documentElement.scrollLeft;
	else if(document.body && document.body.scrollLeft)
		offset = document.body.scrollLeft;
	return offset;
}

function getScrY() {
	var offset = 0;
	if(window.pageYOffset)
		offset = window.pageYOffset;
	else if(document.documentElement && document.documentElement.scrollTop)
		offset = document.documentElement.scrollTop;
	else if(document.body && document.body.scrollTop)
		offset = document.body.scrollTop;
	return offset;
}

function getWinX() {
	var size = 0;
	if(window.innerWidth)
		size = window.innerWidth;
	else if(document.documentElement && document.documentElement.clientWidth)
		size = document.documentElement.clientWidth;
	else if(document.body && document.body.clientWidth)
		size = document.body.clientWidth;
	else size = screen.width;
	return size;
}

function getWinY() {
	var size = 0;
	if(window.innerHeight)
		size = window.innerHeight;
	else if(document.documentElement && document.documentElement.clientHeight)
		size = document.documentElement.clientHeight;
	else if(document.body && document.body.clientHeight)
		size = document.body.clientHeight;
	else size = screen.height;
	return size;
}

function getMouseXY(e) {
	if(e && e.pageX != null) {
		mouseX = e.pageX;
		mouseY = e.pageY;
	}
	else if(event && event.clientX != null) {
		mouseX = event.clientX + getScrX();
		mouseY = event.clientY + getScrY();
	}
	if(mouseX < 0) mouseX = 0;
	if(mouseY < 0) mouseY = 0;
	if(tooltip && tooltip.active) tooltip.move();
}

function toolTip(text, width, opacity) {
	if(text) {
		tooltip = new TOOLTIP();
		tooltip.text = text;
		if(width) tooltip.width = width;
		if(opacity) tooltip.opacity = opacity;
		tooltip.create();
	}
	else if(tooltip) tooltip.hide();
}

//----------------------------------------------------------------------------------------------------
// Build tooltip box
//----------------------------------------------------------------------------------------------------
document.write('<div id="ToolTip" style="position:absolute; visibility:hidden"></div>');

//----------------------------------------------------------------------------------------------------
// Event handlers
//----------------------------------------------------------------------------------------------------
var mouseX = mouseY = 0;
document.onmousemove = getMouseXY;

//----------------------------------------------------------------------------------------------------