求助!!!下面这段flash脚本是什么意思
functionIII(){PW=350;PH=450;PC=16777215/*0xFFFFFF*/;MP=36;AS=0.08;SN=0.002;DR=0.4;DA=20;SY=_y;PWH=PWPH;PY=(PH/2)PW;DD=1;VR=-1;ENP=2.5;CP=0.5;DRG=false;attachMovie("CB","BRB",110);attachMovie("CB","TRB",111);attachMovie("CB","BLB",120);attachMovie("CB","TLB",121);BLB._xscale=(TLB._xscale=-100);TLB._yscale=(TRB._yscale=-100);BRB._x=(TRB._x=PW);BLB._x=(TLB._x=-PW);BLB._visible=(TLB._visible=false);PI(ENP,DD,VR);}functionMM(){this.createEmptyMovieClip("FBPM",70);with(FBPM){beginFill(21760,100);lineto(PWH,(-VR)*PWH);curveto(0,((-VR)*2)*PWH,-PWH,(-VR)*PWH);lineTo(0,0);endFill();}FBPM.duplicateMovieClip("FTPM",80);this.createEmptyMovieClip("FSM",90);DP(FSM,-DD,VR);FSM._rotation=(VR*DD)*90;this.createEmptyMovieClip("SSM",100);DP(SSM,DD,VR);FBP.setMask(FBPM);FTP.setMask(FTPM);FS.setMask(FSM);SS.setMask(SSM);}functionL01(rrr){return(((rrr>1)?1:(((rrr0.666666666666667)?((MRO=MROAS)):((MRO=MRO-AS)));}return(L01(MRO));}functionSAFP(ENP,DD){PI(ENP,DD,VR);startX=DD*PW;BRB._visible=(BLB._visible=(TRB._visible=(TLB._visible=0)));PRO=0;FFF(ODR);onEnterFrame=function(){FA(L01((PRO=PROAS)));};CP=ENP;}functionSB(){varm=((-VR)*(PW(PH/2)));vare=(PH/2);BRB._y=(BLB._y=me);TRB._y=(TLB._y=m-e);}functionFA(goalR){step=(goalR-ODR)*DR;ODR=ODRstep;FFF(ODR);if(ODR>(1-SN)){FFF(1);FD();if(AFG){if(CP!=EAFP){SAFP(CP(DAF*2),DAF);}else{AFG=false;}}}}functionturnTo(ENP){if(ENP!=CP){if(!onEnterFrame){vard=((ENP>CP)?1:-1);SAFP(ENP,d);}}}functionflipTo(targPage){if(targPage>CP){DAF=1;}elseif(targPage(1-SN)){FFF(1);PRO=1;FD();}}};}functionPI(ep,d,v){ENP=ep;DD=d;VR=v;_y=(SY(v*((PY*_yscale)/100)));SST();SFG();SSW();MM();LB();SB();}functionSST(){createEmptyMovieClip("SLP",10);if(ENP!=0.5){DP(SLP,-1,VR);varPN=((DD==1)?(CP-0.5):(ENP-0.5));varSLPP=SLP.attachMovie("print"PN,"Print",1);SLPP._x=(-PW)/2;SLPP._y=(-VR)*PY;}createEmptyMovieClip("SRP",20);if(ENP!=(MP0.5)){DP(SRP,1,VR);varPN=((DD==1)?(ENP0.5):(CP0.5));varSRPP=SRP.attachMovie("print"PN,"Print",1);SRPP._x=PW/2;SRPP._y=(-VR)*PY;}vart=((DD>0)?(SLP):(SRP));t.createEmptyMovieClip("Shade",2);MSE(t.Shade,-DD,VR);}functionDRRS(){if(MRO>0.666666666666667){CP=CP(2*DD);}PD=(DRG=false);BRB._visible=(BLB._visible=(TLB._visible=(TRB._visible=false)));}functionPSRS(side){if(PD){PD=false;}else{flipTo(CP(side*2));}}stop();III();BLB.onRollOver=function(){SMF(-1,1);};TLB.onRollOver=function(){SMF(-1,-1);};BRB.onRollOver=function(){SMF(1,1);};TRB.onRollOver=function(){SMF(1,-1);};BLB.onRollOut=(BRB.onRollOut=(TRB.onRollOut=(TLB.onRollOut=function(){DRG=false;})));BLB.onRelease=(TLB.onRelease=function(){PSRS(-1);});BRB.onRelease=(TRB.onRelease=function(){PSRS(1);});BLB.onDragOut=(TLB.onDragOut=function(){PD=true;BRB._visible=(TRB._visible=false);});BRB.onDragOut=(TRB.onDragOut=function(){PD=true;BLB._visible=(TLB._visible=false);});BLB.onReleaseOutside=(BRB.onReleaseOutside=(TLB.onReleaseOutside=(TRB.onReleaseOutside=function(){DRRS();})));