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

Modifie par ReflexeCE pour :
  utilisation dans div
  adaptation automatique taille image
  fonctionne dans IE au-dessus select et dans Firefox au-dessus div en overflow:auto
*/

var offsetfrommouse=[15,15]; //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.
var h=1;
var w=1;

var div_id_decalage='';

if (document.getElementById || document.all){
	document.write('<div id="trailimageid" style="position: absolute;visibility: hidden;left: 0px;top: 0px;width: 0px;height: 0px;z-index: 1000;">');
  //document.write('  <img id="ttimg" src="img/blank.gif" border="0" />');
  document.write('  <iframe id="frame_ie" frameborder="0" scrolling="no" src="about:blank" style="z-index:999; position:absolute; filter:alpha(opacity=0); border: 0px;"></iframe>');
  document.write('</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 showtrail(imagename,div_id,height){

	image=new Image();
  image.src=imagename;
  if (image.height > 0)
  {
    h=image.height+1;
    w=image.width+1;
  }
  else
  {    h=0;
    w=0;
  }
  image.free;

  document.onmousemove=followmouse;

  gettrailobj().top="-1000px";
  gettrailobj().left="-1000px";
	gettrailobj().width=w+"px";
  gettrailobj().height=h+"px";
  //document.getElementById('ttimg').src=imagename;
  gettrailobj().background = "url("+imagename+") no-repeat";
  div_id_decalage=div_id;
	gettrailobj().visibility="visible";

  document.getElementById("frame_ie").style.height=h+"px";
	document.getElementById("frame_ie").style.width=w+"px";
	document.getElementById("frame_ie").style.visibility="visible";
}


function hidetrail(){
	gettrailobj().visibility="hidden"
	document.onmousemove=""
	gettrailobj().top="-1000px";
  gettrailobj().left="-1000px";

  document.getElementById("frame_ie").style.visibility = "hidden";
}

function followmouse(e){

	var xcoord=offsetfrommouse[0];
	var ycoord=offsetfrommouse[1];

	if (div_id_decalage != '')
  {
    var decalageX=parseInt(document.getElementById(div_id_decalage).offsetLeft, 10);
    var decalageY=parseInt(document.getElementById(div_id_decalage).offsetTop, 10);
  }
  else
  {
    var decalageX=0;
    var decalageY=0;
  }

  xcoord=xcoord-decalageX;
  ycoord-=ycoord+decalageY;

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

	//if (document.all){
	//	gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
	//} else {
	//	gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
	//}

	if (typeof e != "undefined"){
		if (docwidth - e.pageX < 300){
			xcoord = e.pageX - xcoord - 286; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (h + 110)){
			ycoord += e.pageY - Math.max(0,(110 + h + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 300){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 286; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (h + 110)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(110 + h + event.clientY - docheight));
		} else {
			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)

	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"
}