function rnd(x,y) { 
	var num;
	do {
		num = parseInt(Math.random()*100);
		if (num >= x && num <= y) break;
	} while (true);
return(num);
}

function lead0 (x) {
	if (x<10) return '0'+x; else return x;
}

function msToTime (ms) {
var st="";	
	sec=Math.floor(ms/10); 
 	minut=Math.floor(sec/60); sec-=minut*60;
 	hour=Math.floor(minut/60); minut-=hour*60;
 	st=lead0(minut)+':'+lead0(sec);
 	if (hour>0) st=lead0(hour)+':'+st;
	return st;		
}