// Extended Tooltip Javascript
// copyright 9th August 2002, by Stephen Chapman, Felgall Pty Ltd
// permission is granted to use this javascript provided that the below code is not altered
var DH = 0;
var an = 0;
var al = 0;
var ai = 0;
if (document.getElementById) {
  ai = 1; 
  DH = 1;
} else {
  if (document.all) {
    al = 1; 
    DH = 1;
  } else { 
    browserVersion = parseInt(navigator.appVersion); 
    if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {
      an = 1; 
      DH = 1;
    }
  }
} 

function fd(oi,ws) {
  if (ws == 1) {
    if (ai) {
      return (document.getElementById(oi).style);
    } else {
      if (al) {
        return (document.all[oi].style);
      } else {
        if (an) {
          return (document.layers[oi]);
        }
      }
    }
  } else {
    if (ai) {
      return (document.getElementById(oi));
    } else {
      if (al) {
        return (document.all[oi]);
      } else {
        if (an) {
          return (document.layers[oi]);
        }
      }
    }
  }
} 

function pw() {
  if (window.innerWidth != null) return window.innerWidth; 
  if (document.body.clientWidth != null) return document.body.clientWidth; 
  return (null);
} 
function popUp(evt,oi) {
  if (DH) {
    var wp = pw(); 
    ds = fd(oi,1); 
    dm = fd(oi,0); 
    st = ds.visibility; 
    if (dm.offsetWidth) {
      ew = dm.offsetWidth; 
    } else if (dm.clip.width) {
      ew = dm.clip.width; 
    }
    if (st == "visible" || st == "show") { 
      ds.visibility = "hidden"; 
    } else { 
      if (evt.y || evt.pageY) {
        if (evt.pageY) {
          tv = evt.pageY + 20;
          lv = evt.pageX - (ew/4);
        } else {
          tv = evt.y + 20 + document.body.scrollTop; 
          lv = evt.x  - (ew/4) + document.body.scrollLeft;
        }
        if (lv < 2) {
          lv = 2;
        } else if (lv + ew > wp) {
          lv -= ew/2;
        }
        if (!an) {
          lv += 'px';
          tv += 'px';
        }
        ds.left = lv;
        ds.top = tv;
      } 
      ds.visibility = "visible";
    }
  }
}