var tool_layer = document.createElement("div");
document.body.appendChild(tool_layer);
tool_layer.style.position = "absolute";
tool_layer.style.display = "none";

//Define style for message box here:
tool_layer.className = "tooltip";

var tooltip = {
    displayed: false,
    on: function(message) {
        tool_layer.innerHTML = message.previousSibling.innerHTML;
        this.displayed = true;

    },
    off: function() {
        this.displayed = false;
        tool_layer.style.display = "none";

    },
    move: function(evt) {
        var dist = 5;
        var disty = -39;
        if (this.displayed) {
            if (document.addEventListener) {
                tool_layer.style.left = ((evt.clientX + window.pageXOffset) + dist) + 'px';
                tool_layer.style.top = ((evt.clientY + window.pageYOffset) + disty) + 'px';
            }
            else if (window.opera) {
                tool_layer.style.left = ((evt.clientX + window.pageXOffset) + dist) + 'px';
                tool_layer.style.top = ((evt.clientY + window.pageYOffset) + disty) + 'px';
            }
            else if (window.event) {
                if (document.compatMode && document.compatMode != 'BackCompat') {
                    tool_layer.style.left = ((event.clientX + document.documentElement.scrollLeft) + dist) + 'px';
                    tool_layer.style.top = ((event.clientY + document.documentElement.scrollTop) + disty) + 'px';
                }
                else {
                    tool_layer.style.left = ((event.clientX + document.body.scrollLeft) + dist) + 'px';
                    tool_layer.style.top = ((event.clientY + document.body.scrollTop) + disty) + 'px';
                }
            }
            else if (document.layers) {
                tool_layer.left = evt.pageX + 15;
                tool_layer.top = evt.pageY - 30;
            }
            tool_layer.style.display = "block";
        }

    },
    click: function(message) {
        this.off();
    }
}