(function( $ ) {
     $.fn.myPlugin = function() {
        var defaults = {
            width: 800,
            height: 700,
            scrollbars: 1,
            location: 1,
            status: 1
        },
        self = this,
        opts = $.extend(defaults, options);
        this.filter('a').click(function() {
            $("a").attr("target","_self");
            window.open($(this).attr('href'),'title', opts);
            return this;
        });
    };

}( jQuery ));
$('a').myPlugin();