var x = 0;
var y = 0;

function helpOn(text) {
if (window.Event) {
document.captureEvents(Event.MOUSEMOVE);
}
document.onmousemove = getXY;

/* jine hodnoty pro IE */
var jmenoProhlizece=navigator.appName; 

  if (jmenoProhlizece=="Microsoft Internet Explorer") {
  document.getElementById("helptext").style.top=document.body.scrollTop+y+15+"px";
    }
  else {
  document.getElementById("helptext").style.top=y+15+"px";
    }
    
document.getElementById("helptext").style.left=x+15+"px";
document.getElementById("helptext").style.visibility="visible";
document.getElementById("helptext").innerHTML=text;
}

function getXY(e) {
x = (window.Event) ? e.pageX : event.clientX;
y = (window.Event) ? e.pageY : event.clientY;
}

function helpOff() {
document.getElementById("helptext").style.top="-1000px";
document.getElementById("helptext").style.left="-1000px";
document.getElementById("helptext").style.visibility="hidden";
}