}

this.isHiting=true;

}else{

this.isHiting=false;

}

};//为MovieClip添加域成员listen成员,用于监视当前对象与目标是否碰撞

MovieClip.prototype.watch=function(target){

this.timer=setInterval(this,"listen",50,target);

};//以每50毫秒检测一次的速度来检测是否碰撞

MovieClip.prototype.unWatch=function(){

clearInterval(this.timer);

};//停止对对象的监视

ASBroadcaster.initialize(MovieClip.prototype);//初始化MovieClip原型为事件源

//下面是调用的示例

//假设有两个MovieClip,左边ball,右边wall,让ball不断往wall移动,同时监视wall,一旦击中触发事件onHitTest

ball.onEnterFrame=function(){

this._x+=5;

};//让ball不断往右方移动工

myListener=newObject();

myListener.onHitTest=function(source,target){

trace("The"+source._name+"hit"+target._name+".");

};

ball.addListener(myListener);//创建监听员并注册给ball

ball.watch(wall);//让ball监视wall

[page_break]　

MD5 32位码的Flash算法

以下是引用片段：

//-----------

functionmd5(s){

returnbinl2hex(core_md5(str2binl(s),s.length*strsize));

}

functioncore_md5(x,len){

x[len>>5]=(x[len>>5])|(128<<len%32);

x[(((len+64)>>>9)<<4)+14]=len;

vara=1732584193;

varb=-271733879;

varc=-1732584194;

vard=271733878;

vari=0;

while(ivarolda=a;

varoldb=b;

varoldc=c;

varoldd=d;

a=md5_ff(a,b,c,d,x[i+0],7,-680876936);

d=md5_ff(d,a,b,c,x[i+1],12,-389564586);

c=md5_ff(c,d,a,b,x[i+2],17,606105819);

b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);

a=md5_ff(a,b,c,d,x[i+4],7,-176418897);

d=md5_ff(d,a,b,c,x[i+5],12,1200080426);

c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);