var w=1
var h=1

if (document.getElementById || document.all)
document.write('<div id="trailimageid" style="position:absolute;visibility:hidden;left:0px;top:-1000px;width:0px;height:0px;padding:5px;margin:0;background:#FFFFFF;"><img id="ttimg" src="/images/s.gif" /></div>')

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

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

function hidetrail()
{
	document.onmousemove=""
	document.getElementById('ttimg').src='/images/s.gif'
	gettrailobj().visibility="hidden"
// 	gettrailobj().left=-1000
	gettrailobj().top=0
}


function showtrail(width,height,file)
{
	w=width
	h=height
window.onscroll = hidetrail;
document.onmousemove=followmouse;
dis_obj = document.getElementById('ttimg');	
	dis_obj.src=file
	dis_obj.onload = function() { 
		if (dis_obj.width > 1) {
		w=dis_obj.width;
		h=dis_obj.height;
		preview_div = document.getElementById('trailimageid');
		preview_div.style.border='1px solid #000000';
		img_obj = gettrailobj();

			
			
	
		if ( isNaN(w) )
			img_obj.width = w;
		else
			img_obj.width=w+"px";
		if ( isNaN(h) )
			img_obj.height = h;
		else
			img_obj.height=h+"px"

		preview_div.style.height=h;
		preview_div.style.width=w;		
	
		img_obj.visibility="visible";
		
		} 
	};
	
	
	followmouse( window.event );
		

	
	
	
	

}


function followmouse(e)
{
	var xcoord=20
	var ycoord=20

	if (typeof e != "undefined")
	{
		xcoord+= (isNaN( e.pageX ) ? e.clientX : e.pageX );
		ycoord+= (isNaN( e.pageY ) ? e.clientY : 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"
	
}