o = null;
var overState = false;
document.onmousemove = update;

function update(evt) {

var useragent = navigator.userAgent;

  if (useragent.indexOf('Opera') > -1) {
	  x = (document.all) ? window.event.x + document.body.scrollLeft : evt.pageX;
    y = (document.all) ? window.event.y + document.body.scrollTop  : evt.pageY;
  } else {
    x = (document.all) ? window.event.x : evt.pageX;
    y = (document.all) ? window.event.y : evt.pageY;
 }

	if (o != null && overState==true) {
		o.style.left = (x + 15) + "px";
		o.style.top 	= (y + 20) + "px";
	} else if(o != null && overState==false) o.style.display = "none";
	
}

function show(id) {
    overState = true;
    document.onmousemove = update;
	o = document.getElementById(id);
    window.setTimeout(display_tooltip,1000);
	
}

function display_tooltip(){
  	if(overState == true) o.style.display = "block";
  	else o.style.display = "none";
}

function hide() {
    overState = false;
	o.style.display = "none";
}


// 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";
		}
	}
}