(function(jQuery){jQuery.fx.step.clip=function(fx){if($(fx.elem).is(':visible')){if(fx.start==0){var emCoef=(parseInt($(fx.elem).css('fontSize'))*1.333),horizontalPercentCoef=$(fx.elem).width()/100,verticalPercentCoef=$(fx.elem).height()/100,regExp={parseSize:/^(\d{1,}(\.\d+)?)(px|em|%)$/,stripRect:/rect\(([^)]*)\)/,splitRect:/[,\s]\s*/,matchAuto:/^auto$/},autoSizes=['0px','101%','105%','0px'];var parseClipRect=function(rectStr){var rect=((typeof rectStr!='string')||(rectStr=='')||(rectStr=='auto'))?['auto','auto','auto','auto']:rectStr.replace(regExp.stripRect,'$1').split(regExp.splitRect);$.each(rect,function(i,size){var matches=regExp.parseSize.exec(size.replace(regExp.matchAuto,autoSizes[i]));rect[i]=parseFloat(matches[1]);switch(matches[3]){case'em':rect[i]*=emCoef;break;case'%':rect[i]*=((i%2)?horizontalPercentCoef:verticalPercentCoef);break;}});return rect;};fx.start=parseClipRect(fx.elem.style.clip);fx.end=parseClipRect(fx.end);}
var currentRect=[];for(var i=0;i<4;++i){currentRect.push((fx.pos*(fx.end[i]-fx.start[i]))+fx.start[i]);}
fx.elem.style.clip='rect('+currentRect.join('px ')+'px)';}else{fx.elem.style.clip='auto';}}})(jQuery);