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:1px;height:1px;border:1px solid #888888;background:#DDDDDD;z-index:1000;"><img id="ttimg" src="img/s.gif" /></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('ttimg').src = '/img/s.gif'
    gettrailobj().visibility = "hidden"
    gettrailobj().left = -1000
    gettrailobj().top = 0
}

function showtrail(width, height, file){
    if (navigator.userAgent.toLowerCase().indexOf('opera') == -1) {
        w = width
        h = height
        
        // followmouse()
        
        document.getElementById('ttimg').src = file
        document.onmousemove = followmouse
        gettrailobj().visibility = "visible"
        gettrailobj().width = w + "px"
        gettrailobj().height = h + "px"
        
        
    }
}

function followmouse(e){

    if (navigator.userAgent.toLowerCase().indexOf('opera') == -1) {
    
        var xcoord = 20
        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"
        
    }
}