function getTipDefinition(tipname) {
	var result = null;
	for(var i=0; i<tips.length; i++) {
			if(tips[i][0] == tipname) {
					result = tips[i];
					break;
			}
	}
	return result;
}

function displayToolTip(tipname) {
    var tipDef = getTipDefinition(tipname);
	document.getElementById("tip-layer-title").innerHTML = tipDef[1];
    document.getElementById("tip-layer-desc").innerHTML = tipDef[2];
	if (clickY == 0) {
		clickY = 450;
	}
	if (navigator.appName=='Microsoft Internet Explorer') {
		document.getElementById("tip-layer").style.pixelTop  =  clickY;
	} else {
		document.getElementById("tip-layer").style.top =  clickY + 'px';
	}
	document.getElementById("tip-layer").style.visibility = 'visible';
}

function hideToolTip() {
	document.getElementById("tip-layer").style.visibility = 'hidden';
}