prova così

codice:
percorso="mysubdir"
num=11
for (i=0; i<=num; i++) { 
    myclip = "pulsant"+i;
	_root.createEmptyMovieClip(myclip,i)
	_root[myclip].createEmptyMovieClip("box",i+10)
	with(_root[myclip].box){
			beginFill(0x669999,100);
			moveTo(0,0);
    		lineStyle(2,0x000000,100);
    		lineTo(100,0);
    		lineStyle(2,0x000000,100);
    		lineTo(100,20);
    		lineStyle(2,0x000000,100);
    		lineTo(0,20);
    		lineStyle(2,0x000000,100);
    		lineTo(0,0);
			lineStyle(2,0x000000,100);
	}
	_root[myclip]._x=0
	_root[myclip]._y=20*i-20
	myurl = percorso+"/scheda"+i+".htm";
	associa(myclip,myurl)
	associa = function(nome,scheda){
		
    _root[nome].onPress = function() {
		trace(scheda)
    //getURL("javascript: window.open('"+url+" ','titoloFINESTRA','width=800,height=500');void(0)"); 
    }; 
	}
}