Ticket #67: center.txt

$.fn.center = function(f) {
        return this.each(function(){
                if ( !f && this.nodeName == 'IMG' &&
                                 !this.offsetWidth && !this.offsetHeight ) {
                        var self = this;
                        setTimeout(function(){
                                $(self).center(true);
                        }, 13);
                } else {
                        var s = this.style;
                        var p = this.parentNode;
                        var b = document.body;
                        var t = 0;

                        if ( f != "vertical" )
                        {
                                if ( $.css(p,"position") == 'static' )
                                        p.style.position = 'relative';
                                s.position = 'absolute';
                                if ( ! isNaN(parseInt($.css(p,"width"))) )
                                {
                                        t = parseInt(($.css(p,"width") - $.css(this,"width"))/2);
                                        if ( t > 0 )
                                                s.left = t + "px";
                                        else
                                                s.left = "0px";
                                }
                                else if ( ! isNaN( b.clientWidth ) )
                                {
                                        t = parseInt((b.clientWidth - $.css(this,"width"))/2);
                                        if ( t > 0 )
                                                s.left = t + "px";
                                        else
                                                s.left = "0px";
                                }
                        }

                        if ( f != "horizontal" )
                        {
                                if ( ! isNaN(parseInt($.css(p,"height"))) )
                                {
                                        t = parseInt(($.css(p,"height") - $.css(this,"height"))/2);
                                        if ( t > 0 )
                                                s.top = t + "px";
                                        else
                                                s.top = "0px";
                                }
                                else if ( ! isNaN( b.clientHeight ) )
                                {
                                        t = parseInt((b.clientHeight - $.css(this,"height"))/2);
                                        if ( t > 0 )
                                                s.top = t + "px";
                                        else
                                                s.top = "0px";
                                }
                        }
                }
  });
};