var offsetfrommouse=[-42,-110]; //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 currentimageheight = 84;	// maximum image size.

if (document.getElementById || document.all){
	document.write('<div id="trailimageid">');
	document.write('</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,description,showthumb,height){

document.body.style.overflowX='hidden';

	if (height > 0){
		currentimageheight = height;
	}
	document.onmousemove=followmouse;
	newHTML = '';
	if (showthumb > 0){
	newHTML = '<div style="padding: 0px; z-index: 10; width: 84px;" class="pop_up_box"><div style="padding: 0;"><img src="' + imagename + '" border="0" width="84" height="84" style="border: 2px solid #FFFFFF;"></div></div>';
	}

	gettrailobjnostyle().innerHTML = newHTML;

	gettrailobj().visibility="visible";

}


function hidetrail(){
	gettrailobj().visibility="hidden"
	document.onmousemove=""
	document.body.style.overflowX='visible'

}

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)

	if (typeof e != "undefined"){
	//Safari
		if (docwidth - e.pageX < 250){
			xcoord = e.pageX - xcoord - 0; 
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + 5)){
			ycoord += e.pageY - Math.max(0,(e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
	//IE
		if (docwidth - event.clientX < 250){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 0; 
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + 5)){
			//When scrolling is above image
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(event.clientY - docheight));
			
		} else {
			//when scrolling is below image
			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(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"

}