// JavaScript Document

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

var trailsize=[100, 99] //image path, plus width and height
var offsetfrommouse=[-33,-255] //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=0 //duration in seconds image should remain visible. 0 for always.


function gettrailobj(){
if (document.getElementById)
return document.getElementById("zoom").style
else if (document.all)
return document.all.zoom.style
}

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

function hidetrail(e){
gettrailobj().visibility="hidden"
document.getElementById("zoom").innerHTML
document.onmousemove=""
}

function followmouse(e){
gettrailobj().visibility="visible"
var xcoord=offsetfrommouse[0]
var ycoord=offsetfrommouse[1]
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+trailsize[0]+3>docwidth || ycoord+trailsize[1]> docheight)
gettrailobj().display="none"
else 
xcoord=xcoord-350;
ycoord=ycoord+50;
gettrailobj().display=""
gettrailobj().left=xcoord+"px"
gettrailobj().top=ycoord+"px"
}

function trailStart() {
	if (document.onmousemove=="" || document.onmousemove == undefined || document.onmousemove == null) document.onmousemove = followmouse;
	
}

function changeText(image,titulo,text,url) {
	if (image=='') image='embranco.gif';

	document.getElementById("zoom").innerHTML = "<img src='imagens/port/"+image+"' align='center'>"

}