Ext.override(Ext.ToolTip, {
    onTargetOver : function(e){
        if(this.disabled || e.within(this.target.dom, true)){
            return;
        }
        var t = e.getTarget(this.delegate);
        if (t) {
            this.triggerElement = t;
            this.clearTimer('hide');
            this.targetXY = e.getXY();
            this.delayShow();
        }
    },
    onMouseMove : function(e){
        var t = e.getTarget(this.delegate);
        if (t) {
            this.targetXY = e.getXY();
            if (t === this.triggerElement) {
                if(!this.hidden && this.trackMouse){
                    this.setPagePosition(this.getTargetXY());
                }
            } else {
                this.hide();
                this.lastActive = new Date(0);
                this.onTargetOver(e);
            }
        } else if (!this.closable && this.isVisible()) {
            this.hide();
        }
    },
    hide: function(){
        this.clearTimer('dismiss');
        this.lastActive = new Date();
        delete this.triggerElement;
        Ext.ToolTip.superclass.hide.call(this);
    }
});