jQuery.fn.vibrate = function(){

        // Loop over each of the elements in the jQuery
        // stack so that we can set up the properties
        // for the individual elements.
        this.each(
                function( intI ){
                        // Get a jQuery object for this element.
                        var jNode = $( this );

                        // Default plugin to not be vibrating.
                        var blnVibrate = false;

                        // Get current position of the element.
                        var intLeft = parseInt( jNode.css( "left" ) );
                        var intTop = parseInt( jNode.css( "top" ) );


                        // Create a function pointer that will
                        // handle the updating of elements position
                        // such that it will make it appear to be
                        // vibrating.
                        var fnUpdatePosition = function(){
                                var intCurrentLeft = parseInt(
                                        jNode.css( "left" )
                                        );

                                var intCurrentTop = parseInt(
                                        jNode.css( "top" )
                                        );


                                // Check to see if we should keep going.
                                if (blnVibrate){

                                        // Check to see which direction to
                                        // adjust in - either vert. or horz.
                                        if (Math.random() > .5){

                                                // Adjust vertically.
                                                if (intCurrentTop > intTop){
                                                        intCurrentTop = (intTop - 2);
                                                } else {
                                                        intCurrentTop = (intTop + 2);
                                                }

                                        } else {

                                                // Adjust horizontally.
                                                if (intCurrentLeft > intLeft){
                                                        intCurrentLeft = (intLeft - 2);
                                                } else {
                                                        intCurrentLeft = (intLeft + 2);
                                                }

                                        }

                                        // Set a timeout to call this method
                                        // again and update position.
                                        setTimeout(
                                                fnUpdatePosition,
                                                60
                                                );

                                } else {

                                        // Reset position.
                                        intCurrentLeft = intLeft;
                                        intCurrentTop = intTop;

                                }


                                // Update the position.
                                jNode.css(
                                        "top",
                                        (intCurrentTop + "px")
                                        );

                                jNode.css(
                                        "left",
                                        (intCurrentLeft + "px")
                                        );
                        }


                        // Hoook up the mouse over event to flag
                        // that the vibrating should begin.
                        jNode.mouseover(
                                function(){
                                        // Flag vibration.
                                        blnVibrate = true;

                                        // Start vibrating.
                                        fnUpdatePosition();
                                }
                                );


                        // Hook up the mouse out event to flag
                        // that the vibrating should end.
                        jNode.mouseout(
                                function(){
                                        // Clear vibration.
                                        blnVibrate = false;
                                }
                                );

                }
                );
        // END: each()

        // Return the jQuery stack to keep chaining.
        return( this );
}