var w=1;
var h=1;

if (document.getElementById || document.all)
document.write('<div id="trailimageid" style="position:absolute;visibility:hidden;left:0px;top:0px;border:1px solid #FFFFFF;background:#000000;z-index: 2; "></div>');

function pause(millisecondi)
{
    var now = new Date();
    var exitTime = now.getTime() + millisecondi;

    while(true)
    {
        now = new Date();
        if(now.getTime() > exitTime) return;
    }
}

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)
{
	pause(400);

	if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1)
	{
		w=width;
		h=height;
		gettrailobj().visibility="visible";
		gettrailobj().width=w+"px";
		gettrailobj().height=h+"px";
		
		//thisfile="imagemark.php?image="+file;
		//document.getElementById('trailimageid').innerHTML="<div>"+document.getElementById('preload_text').value+"</div>";
		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=-300;
		var ycoord=-200;
		//var ycoord=20
		
		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";
	
	}

}