var w = 1;
var h = 1;

if ( document.getElementById || document.all )
	document.write('<div id="trailimageid" style="position:absolute;z-index:100;visibility:hidden;left:0px;top:-1000px;border:2px solid #888888;background:#DDDDDD;"></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 hidetrail() {
	document.onmousemove = "";
	document.getElementById('trailimageid').innerHTML = "";
	gettrailobj().visibility = "hidden";
	gettrailobj().left = -1000;
	gettrailobj().top = 0;
}
																				
function showtrail(width, height, file) {
	if( navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1 ) {
		w = width;
		h = height;
		gettrailobj().visibility = "visible";
		gettrailobj().width = w + "px";

		document.getElementById('trailimageid').innerHTML = "<img src='"+ file +"' width='"+w+"px'>";
			document.onmousemove = followmouse;
	}
}


function followmouse(e) {
	if( navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1 ) {
		var xcoord = 20;
		var ycoord = -50;

		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 + w + 3 > docwidth)
			xcoord = xcoord - w - (20 * 2);

		if ( ycoord-truebody().scrollTop+h > truebody().clientHeight )
			ycoord = ycoord - h - 20;

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