/**
 * @author Alexander Farkas
  * v. 1.21
	 */


	 (function($) {
		 	if(!document.defaultView || !document.defaultView.getComputedStyle){ // IE6-IE8
						var oldCurCSS = jQuery.curCSS;
								jQuery.curCSS = function(elem, name, force){
												if(name === 'background-position'){
																	name = 'backgroundPosition';
																				}
																							if(name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[ name ]){
																												return oldCurCSS.apply(this, arguments);
																															}
																																		var style = elem.style;
																																					if ( !force && style && style[ name ] ){
																																										return style[ name ];
																																													}
																																																return oldCurCSS(elem, 'backgroundPositionX', force) +' '+ oldCurCSS(elem, 'backgroundPositionY', force);
																																																		};
																																																			}
																																																				
																																																					var oldAnim = $.fn.animate;
																																																						$.fn.animate = function(prop){
																																																									if('background-position' in prop){
																																																													prop.backgroundPosition = prop['background-position'];
																																																																delete prop['background-position'];
																																																																		}
																																																																				if('backgroundPosition' in prop){
																																																																								prop.backgroundPosition = '('+ prop.backgroundPosition;
																																																																										}
																																																																												return oldAnim.apply(this, arguments);
																																																																													};
																																																																														
																																																																															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]];
																																																																																											}
																																																																																												
																																																																																													$.fx.step. backgroundPosition = function(fx) {
																																																																																																if (!fx.bgPosReady) {
																																																																																																				var start = $.curCSS(fx.elem,'backgroundPosition');
																																																																																																							
																																																																																																										if(!start){//FF2 no inline-style fallback
																																																																																																															start = '0px 0px';
																																																																																																																		}
																																																																																																																					
																																																																																																																								start = toArray(start);
																																																																																																																											
																																																																																																																														fx.start = [start[0],start[2]];
																																																																																																																																	
																																																																																																																																				var end = toArray(fx.options.curAnim.backgroundPosition);
																																																																																																																																							fx.end = [end[0],end[2]];
																																																																																																																																										
																																																																																																																																													fx.unit = [end[1],end[3]];
																																																																																																																																																fx.bgPosReady = true;
																																																																																																																																																		}
																																																																																																																																																				//return;
																																																																																																																																																						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];

																																																																																																																																																													};
	 })(jQuery);