跟随鼠标的图形

function doMouseMove() {

layerName = 'iit'

eval('var curElement='+layerRef+'["'+layerName+'"]')
		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"')
		eval('curElement'+styleSwitch+'.visibility="visible"')
		eval('newleft=document.body.clientWidth-curElement'+styleSwitch+'.pixelWidth')
		eval('newtop=document.body.clientHeight-curElement'+styleSwitch+'.pixelHeight')
		eval('height=curElement'+styleSwitch+'.height')
		eval('width=curElement'+styleSwitch+'.width')
		width=parseInt(width)
		height=parseInt(height)
		if (event.clientX > (document.body.clientWidth - 5 - width))
		{
		newleft=document.body.clientWidth + document.body.scrollLeft - 5 - width
		}
		else
		{
		newleft=document.body.scrollLeft + event.clientX
		}
		eval('curElement'+styleSwitch+'.pixelLeft=newleft')

if (event.clientY > (document.body.clientHeight - 5 - height))
		{
		newtop=document.body.clientHeight + document.body.scrollTop - 5 - height
		}
		else
		{
		newtop=document.body.scrollTop + event.clientY
		}
		eval('curElement'+styleSwitch+'.pixelTop=newtop')
}

document.onmousemove = doMouseMove;

</script>
<script language="javascript">
	if (navigator.appName == "Netscape") {

}
	else
	{
		document.write('<div ID=OuterDiv>')
		document.write('<img ID=iit src="