// Our plugin will be defined within an immediately
// executed method.
(
    function( $ ) {

        // Default to the current location.
        var strLocation = window.location.href;
        var strHash = window.location.hash;
        var strPrevLocation = "";
        var strPrevHash = "";

        // This is how often we will be checkint for
        // changes on the location.
        var intIntervalTime = 100;

        // This method removes the pound from the hash.
        var fnCleanHash = function( strHash ) {
            return(
                strHash.substring( 1, strHash.length )
            );
        }

        // This will be the method that we use to check
        // changes in the window location.
        var fnCheckLocation = function(){
            // Check to see if the location has changed.
            if (strLocation != window.location.href){

                // Store the new and previous locations.
                strPrevLocation = strLocation;
                strPrevHash = strHash;
                strLocation = window.location.href;
                strHash = window.location.hash;

                // The location has changed. Trigger a
                // change event on the location object,
                // passing in the current and previous
                // location values.
                $( window.location ).trigger("change", {
                    currentHref: strLocation,
                    currentHash: fnCleanHash( strHash ),
                    previousHref: strPrevLocation,
                    previousHash: fnCleanHash( strPrevHash )
                });

            }
        }

        // Set an interval to check the location changes.
        setInterval( fnCheckLocation, intIntervalTime );
    }
)( jQuery );