var trailimage = ["image1.gif", 16, 26] // image, width, height
var ofsm = [10, 20]

if (document.getElementById || document.all)
    document.write('<div id="trailimageid" style="position:absolute;visibility:visible;left:10px;top:10px;width:1px;height:1px;z-index:999;"><img src="' + trailimage[0] + '" border="0" width="' + trailimage[1] + 'px" height="' + trailimage[2] + 'px"></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 followmouse(e) {
    var xcoord = ofsm[0]
    var ycoord = ofsm[1]
    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 + trailimage[1] + 3 > docwidth || ycoord + trailimage[2] > docheight)
        gettrailobj().display = "none"
    else
        gettrailobj().display = ""
    gettrailobj().left = xcoord + "px"
    gettrailobj().top = ycoord + "px"
}

document.onmousemove = followmouse