var dom = (document.getElementById) ? true : false;
var ns5 = false;
var ns4 = false;
var ie4 = false;

var ie5 = ((navigator.userAgent.indexOf("MSIE 5")>-1) && dom) ? true : false;
var ie6 = ((navigator.userAgent.indexOf("MSIE 6")>-1) && dom) ? true : false;
var ie7 = ((navigator.userAgent.indexOf("MSIE 7")>-1) && dom) ? true : false;
var ie7 = ((navigator.userAgent.indexOf("MSIE 7")>-1) && dom) ? true : false;
var ffox = ((navigator.userAgent.indexOf("Firefox")>-1) && dom) ? true : false;

var nodyn = (!ns5 && !ns4 && !ie4 && !ie5 && !ie6 && !ie7 && !ffox) ? true : false;
// resize fix for ns4
var origWidth, origHeight;
//~ alert(navigator.userAgent);

// avoid error of passing event object in older browsers
if (nodyn) { event = "nope" }

///////////////////////  CUSTOMIZE HERE   ////////////////////
// settings for tooltip 
// Do you want tip to move when mouse moves over link?
var tipFollowMouse= true;	
// Be sure to set tipWidth wide enough for widest image
var tipWidth= 160;
var offX= 20;	// how far from mouse to show tip
var offY= 12; 
var tipFontFamily= "Verdana, arial, helvetica, sans-serif";
var tipFontSize= "8pt";
// set default text color and background color for tooltip here
// individual tooltips can have their own (set in messages arrays)
// but don't have to
var tipFontColor= "#000000";
var tipBgColor= "#DDECFF"; 
var tipBorderColor= "#000080";
var tipBorderWidth= 3;
var tipBorderStyle= "ridge";
var tipPadding= 4;

////////////////////  END OF CUSTOMIZATION AREA  ///////////////////

// to layout image and text, 2-row table, image centered in top cell
// these go in var tip in doTooltip function
// startStr goes before image, midStr goes between image and text
var startStr = '<div class="thumb_container"><img src="';
var midStr = '">';
var endStr = '</div>';

////////////////////////////////////////////////////////////
//  initTip	- initialization for tooltip.
//		Global variables for tooltip. 
//		Set styles for all but ns4. 
//		Set up mousemove capture if tipFollowMouse set true.
////////////////////////////////////////////////////////////
var tooltip, tipcss;
function initTip() {
//~ alert(navigator.userAgent);
	if (nodyn) return;
	tooltip = document.getElementById('tipDiv');
	tipcss = tooltip.style;

	if (tooltip&&tipFollowMouse) {
		document.onmousemove = trackMouse;
	}
}

window.onload = initTip;

/////////////////////////////////////////////////
//  doTooltip function
//			Assembles content for tooltip and writes 
//			it to tipDiv
/////////////////////////////////////////////////
var t1,t2;	// for setTimeouts
var tipOn = false;	// check if over tooltip link

function doTooltip(e,dati) {
	if (!tooltip) return;
	if (t1) clearTimeout(t1);	
	if (t2) clearTimeout(t2);
	tipOn = true;
	// set colors if included in messages array
	
		var tip ='<img src="' + dati[0] + '">' + '<span class=\"titolo\">' + dati[1] + '</span>';
		//~ tipcss.backgroundColor = curBgColor;
	 	tooltip.innerHTML = tip;
	if (!tipFollowMouse) 
		positionTip(e);
	else 
		t1=setTimeout("tipcss.visibility='visible'",100);
}

var mouseX, mouseY;
function trackMouse(e) {
if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		mouseX = e.pageX;
		mouseY = e.pageY;
	}
	else if (e.clientX || e.clientY) 	{
		mouseX = e.clientX + document.body.scrollLeft
			+ document.documentElement.scrollLeft;
		mouseY = e.clientY + document.body.scrollTop
			+ document.documentElement.scrollTop;
	}
	//~ mouseX = (ns4||ns5)? evt.pageX: window.event.clientX + document.body.scrollLeft;
	//~ mouseY = (ns4||ns5)? evt.pageY: window.event.clientY + document.body.scrollTop;
	//~ alert(mouseX + ', '+ mouseY);
	if (tipOn) positionTip(e);
}

/////////////////////////////////////////////////////////////
//  positionTip function
//		If tipFollowMouse set false, so trackMouse function
//		not being used, get position of mouseover event.
//		Calculations use mouseover event position, 
//		offset amounts and tooltip width to position
//		tooltip within window.
/////////////////////////////////////////////////////////////
function positionTip(e) {
	if (!tipFollowMouse) {
if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		mouseX = e.pageX;
		mouseY = e.pageY;
	}
	else if (e.clientX || e.clientY) 	{
		mouseX = e.clientX + document.body.scrollLeft
			+ document.documentElement.scrollLeft;
		mouseY = e.clientY + document.body.scrollTop
			+ document.documentElement.scrollTop;
	}	}
	// tooltip width and height
	//~ var tpWd = (ns4)? tooltip.width: (ie4||ie5)? tooltip.clientWidth: tooltip.offsetWidth;
	//~ var tpHt = (ns4)? tooltip.height: (ie4||ie5)? tooltip.clientHeight: tooltip.offsetHeight;
	// document area in view (subtract scrollbar width for ns)
	//~ var winWd = (ns4||ns5)? window.innerWidth-20+window.pageXOffset: document.body.clientWidth+document.body.scrollLeft;
	//~ var winHt = (ns4||ns5)? window.innerHeight-20+window.pageYOffset: document.body.clientHeight+document.documentElement.scrollTop;
	
	if (ns4){
		//~ alert('ns4');
		var tpWd = tooltip.width;
		var tpHt = tooltip.height;
	}else if(ie4||ie5){
		//~ alert('ie4||ie5');
		var tpWd = tooltip.clientWidth;
		var tpHt = tooltip.clientHeight;
		var winWd = document.body.clientWidth+document.body.scrollLeft;
		var winHt = document.body.clientHeight+document.documentElement.scrollTop;
	}else if(ie6){
		//~ alert('ie6');
		var tpWd = tooltip.clientWidth;
		var tpHt = tooltip.clientHeight;
		var winWd = document.documentElement.clientWidth+document.documentElement.scrollLeft;
		var winHt = document.documentElement.clientHeight+document.documentElement.scrollTop;
	}else if(ie7){
		//~ alert('ie7');
		var tpWd = tooltip.clientWidth;
		var tpHt = tooltip.clientHeight;
		var winWd = document.body.clientWidth+document.body.scrollLeft;
		var winHt = document.body.clientHeight+document.documentElement.scrollTop;
	}else if(ffox){
		//~ alert('ffox');
		var tpWd = tooltip.offsetWidth;
		var tpHt = tooltip.offsetHeight;
		var winWd = window.innerWidth	- 20	+ window.pageXOffset;
		var winHt = window.innerHeight	- 20	+ window.pageYOffset;
	}else{
		alert('browser non riconosciuto\n' + naviagtor.userAgent);
		var tpWd = 0;
		var tpHt = 0;
		var winWd = 0;
		var winHt = 0;
	}
	//~ alert(mouseY + '+' + offY+ '+' + tpHt + '=' + (mouseY+offY+tpHt) +' - - ' + winWd)
	// check mouse position against tip and window dimensions
	// and position the tooltip 
	if ((mouseX+offX+tpWd)>winWd) 
		tipcss.left = (ns4)? mouseX-(tpWd+offX): mouseX-(tpWd+offX)+"px";
	else 
		tipcss.left = (ns4)? mouseX+offX: mouseX+offX+"px";
		
	if ((mouseY+offY+tpHt)>winHt) 
		tipcss.top = (ns4)? winHt-(tpHt+offY): winHt-(tpHt+offY)+"px";
	else 
		tipcss.top = (ns4)? mouseY+offY: mouseY+offY+"px";
	if (!tipFollowMouse) t1=setTimeout("tipcss.visibility='visible'",100);
}

function hideTip() {
	if (!tooltip) return;
	t2=setTimeout("tipcss.visibility='hidden'",100);
	tipOn = false;
}