var offsetfrommouse=[10,10];
var displayduration=0;
var currentimageheight = 0;
if (document.getElementById || document.all){
	document.write('<div id="trailimageid" style="display:none; z-index:200; position:absolute;"></div>');
}

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

function gettrailobjnostyle(){
  if (document.getElementById)
    return document.getElementById("trailimageid")
  else if (document.all)
    return document.all.trailimagid
}

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

function showtrail(imagename,title,height,width){
	if (height > 0){
		currentimageheight = height;
	}
	document.onmousemove=followmouse;
	newHTML  = '<div style="padding: 5px; background-color: #FFF; border: 1px solid #CCC;"><h3 style="margin-bottom:3px;padding-bottom:3px;border-bottom: 1px dotted #CCC;">' + title + '</h3>';
	newHTML += '<div align="center" style="padding:4px;"><img id="trail_img" src="' + imagename + '" border="0"></div></div>';
	gettrailobjnostyle().innerHTML = newHTML;
	currentimageheight = 0;
	gettrailobj().display="inline";
}

function hidetrail(){
	gettrailobj().innerHTML = " ";
	gettrailobj().display="none"
	document.onmousemove=""
	gettrailobj().left="-15000px"
}

function followmouse(e){
	var xcoord=offsetfrommouse[0]
	var ycoord=offsetfrommouse[1]
	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)
	ox = gettrailobjnostyle().clientWidth;
	oy = gettrailobjnostyle().clientHeight + 12;
	if (typeof e != "undefined"){
		xcoord = e.pageX - xcoord - ox;
		if (docheight - e.pageY < (currentimageheight + oy)){
			if ( document.body ){
				scrollTop = Math.max(truebody().scrollTop, document.body.scrollTop);
			} else {
				scrollTop = truebody().scrollTop;
			}
			ycoord += e.pageY - Math.max(0,(oy + currentimageheight + e.pageY - docheight - scrollTop));
		} else {
			ycoord += e.pageY;
		}
	} else if (typeof window.event != "undefined"){
		xcoord = event.clientX + truebody().scrollLeft - xcoord - ox;
		if (docheight - event.clientY < (currentimageheight + oy)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(oy + currentimageheight + event.clientY - docheight));
		} else {
			ycoord += truebody().scrollTop + event.clientY;
		}
	}
	if(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"
}