var tooltip = function() {
  var id = 'tt';
  var top = 3;
  var left = 3;
  var maxw = 300;
  var speed = 10;
  var timer = 20;
  var endalpha = 95;
  var alpha = 0;
  var tt, t, c, b, h;
  var ie = document.all ? true : false;
  return {
    show:function(v, w) {
      if (tt == null){
        tt = document.createElement('div');
        tt.setAttribute('id', id);
        t = document.createElement('div');
        t.setAttribute('id', id + 'top');
        c = document.createElement('div');
        c.setAttribute('id', id + 'cont');
        b = document.createElement('div');
        b.setAttribute('id', id + 'bot');
        tt.appendChild(t);
        tt.appendChild(c);
        tt.appendChild(b);
        document.body.appendChild(tt);
        tt.style.opacity = 0;
        tt.style.filter = 'alpha(opacity=0)';
        document.onmousemove = this.pos;
      }
      tt.style.display = 'block';
      c.innerHTML = v;
      tt.style.width = w ? w + 'px' : 'auto';
      if(!w && ie){
        t.style.display = 'none';
        b.style.display = 'none';
        tt.style.width = tt.offsetWidth;
        t.style.display = 'block';
        b.style.display = 'block';
      }
      if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
      h = parseInt(tt.offsetHeight) + top;
      clearInterval(tt.timer);
      tt.timer = setInterval(function() {tooltip.fade(1)}, timer);
    },
    pos:function(e) {
      var u = ie ? event.clientY + document.body.scrollTop : e.pageY;
      var l = ie ? event.clientX + document.body.scrollLeft : e.pageX;
      tt.style.top = (u - h) + 'px';
      tt.style.left = (l + left) + 'px';
    },
    fade:function(d) {
      var a = alpha;
      if ((a != endalpha && d == 1) || (a != 0 && d == -1)) {
        var i = speed;
        if (endalpha - a < speed && d == 1) {
          i = endalpha - a;
        } else if(alpha < speed && d == -1) {
          i = a;
        }
        alpha = a + (i * d);
        tt.style.opacity = alpha * .01;
        tt.style.filter = 'alpha(opacity=' + alpha + ')';
      } else {
        clearInterval(tt.timer);
        if (d == -1) { tt.style.display = 'none'; }
      }
    },
    hide:function() {
      clearInterval(tt.timer);
      tt.timer = setInterval(function() {tooltip.fade(-1)}, timer);
    }
  };
}();