var divName = 'div-help'; 
var offX = 15;         
var offY = 15;
function mouseX(evt) {if (!evt) evt = window.event; if (evt.pageX) return evt.pageX; else if (evt.clientX)return evt.clientX + (document.documentElement.scrollLeft ?  document.documentElement.scrollLeft : document.body.scrollLeft); else return 0;} function mouseY(evt) {if (!evt) evt = window.event; if (evt.pageY) return evt.pageY; else if (evt.clientY)return evt.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop); else return 0;} function follow(evt) {if (document.getElementById) {var obj = document.getElementById(divName).style; obj.visibility = 'visible'; obj.left = (parseInt(mouseX(evt))+offX) + 'px';  obj.top = (parseInt(mouseY(evt))+offY) + 'px';}}

function show(div){	
	document.onmousemove = follow;
	obj(div).style.display = "block";		
}
function hide(div){
	document.onmousemove = null;
	obj(div).style.display = "none";	
}
function obj(objectId){
	if (document.getElementById && document.getElementById(objectId)) {
		return document.getElementById(objectId);
	} else if (document.all && document.all(objectId)) {
		return document.all(objectId);
	} else {
		return false;
	}
}