Template:NJU-China/JS3

/**

* @author Alexander Farkas
* v. 1.02
*/

(function($) { $.extend($.fx.step,{ backgroundPosition: function(fx) {

           if (fx.state === 0 && typeof fx.end == 'string') {
               var start = $.curCSS(fx.elem,'backgroundPosition');
               start = toArray(start);
               fx.start = [start[0],start[2]];
               var end = toArray(fx.end);
               fx.end = [end[0],end[2]];
               fx.unit = [end[1],end[3]];

}

           var nowPosX = [];
           nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
           nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];           
           fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];
           
          function toArray(strg){
              strg = strg.replace(/left|top/g,'0px');
              strg = strg.replace(/right|bottom/g,'100%');
              strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
              var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
              return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
          }
       }

}); })(jQuery);