/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact

a la pagina html cridar a l'arxiu
<script type="text/javascript" src="inc/tooltip.js"></script>

cridem la funcio d'aquesta manera
<a href="..."><img onmouseover="showtrail(300,199.743808711,'pic/m/i/ik/ikophotos/105936_54736424.jpg');" onmouseout="hidetrail();" src="pic/s/i/ik/ikophotos/105936_54736424.jpg" width="100" height="67" style="padding-top:27px;" /></a>
(recorda que no sera una imatge sino un text. Haurem de passar el titol i el text en comptes del src)
*/ 

var w=1
var h=1

if (document.getElementById || document.all)
{
	document.write('<div id="trailimageid" style=""></div>');
}

function gettrailobj()
{
	if (document.getElementById) 
	{
		return document.getElementById("trailimageid").style;
	} else {
		if (document.all) 
		{
			return document.all.trailimagid.style;
		}
	}
}

function truebody()
{
	return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function hidetrail()
{
	document.onmousemove=""
	//document.getElementById('trailimageid').src='img/s.gif'
	gettrailobj().visibility="hidden"
	gettrailobj().left=-1000
	gettrailobj().top=0
}


function showtrail(title,text)
{
	if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1)
	{
		w=180;
		h=200;
	
		gettrailobj().visibility="visible";
		gettrailobj().position="absolute";
		gettrailobj().zIndex=100;
		var content_emerg = document.getElementById("trailimageid");
		content_emerg.innerHTML = '<h3>'+title+':</h3>'+text;
		document.onmousemove=followmouse;
	}
}


function followmouse(e)
{

	if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1)
	{

		var xcoord=20;
		var ycoord=20;

		if (typeof e != "undefined")
		{
			xcoord+=e.pageX
			ycoord+=e.pageY
		}
		else if (typeof window.event !="undefined")
		{
			xcoord+=truebody().scrollLeft+event.clientX
			ycoord+=truebody().scrollTop+event.clientY
		}

		var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
		var docheight=document.all? Math.max(truebody().scrollHeight, truebody().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight)

		if (xcoord+w+3>docwidth)
		xcoord=xcoord-w-(20*2)

		if (ycoord-truebody().scrollTop+h>truebody().clientHeight)
		ycoord=ycoord-h-20;
	
		gettrailobj().left=xcoord+"px"
		gettrailobj().top=ycoord+"px"

	}

}