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

Edit 07-11-2006 by Harro van der Klauw
*/

var divID = 'popupImage';
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 currentimageheight = 250;


function getTrailObject()
{
	if (document.getElementById)
		return document.getElementById(divID);
	else if (document.all)
		return document.all[divID];
}

function getObject(id) 
{
	if (document.getElementById)
		return document.getElementById(id);
	else if (document.all)
		return document.all[id];
}


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

function showtrail()
{
	/*
		arguments:
			- image location
			- title
			- botom (optional)
			- right (optional)
			- height
	*/
	if(arguments.length < 3 || arguments.length > 5) return;
	imagename = arguments[0];
	title = arguments[1];
	height = arguments[arguments.length - 1];
	if(arguments.length >= 4)
		bottom = arguments[2];
	else
		bottom = '';
	if(arguments.length == 5)
		right = arguments[3];
	else
		right = '';
	
	if(height > 0)
		currentimageheight = height;
	
	document.onmousemove=followmouse;
	
	getObject('hoverTitle').innerHTML = title;
	getObject('hoverImage').src = imagename;
	
	if(bottom != '')
		getObject('hoverBottom').innerHTML = bottom;
	if(right != '')
		getObject('hoverRight').innerHTML = right;
	
	
	getTrailObject().style.display="inline";
}


function hidetrail(){
	getObject('hoverTitle').innerHTML = '';
	getObject('hoverImage').src = '';
	getObject('hoverBottom').innerHTML = '';
	getObject('hoverRight').innerHTML = '';
	getTrailObject().style.display="none"
	document.onmousemove=""
	getTrailObject().style.left="-1000px"

}

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"){
		if (docwidth - e.pageX < 380){
			xcoord = e.pageX - xcoord - 400; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + 150)){
			ycoord += e.pageY - Math.max(0,(150 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {			
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 380){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 400; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX;
		}
		if (docheight - event.clientY < (currentimageheight + 150)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(150 + currentimageheight + 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)
					);
	if(ycoord < 0) { ycoord = ycoord * -1; }
	getTrailObject().style.left = xcoord + "px";
	getTrailObject().style.top = ycoord + "px";

}