// tooltip che segue il mouse
function showToolTip(id,e,text){
	if(document.all)e = event;
	var obj = document.getElementById(id);
	if(text!=null)obj.innerHTML = text;
	obj.style.display = 'block';
	var st = Math.max(document.body.scrollTop,document.documentElement.scrollTop);
	var sl = Math.max(document.body.scrollLeft,document.documentElement.scrollLeft);
	obj.style.left = e.clientX + sl + 'px';
	obj.style.top = e.clientY - 30 + st + 'px';
}