function init() {
    var inframe = document.getElementById("inframe");
    inframe.style.left = "0px";
    inframe.style.top  = "0px";
}
init();
var timer0;
var timer1;
var num = 0;
var endNum = 18;
var maxNum = 90;

timer0=setInterval(function(){setScrollTimer();},5000);


function setScrollTimer(){
	timer1 = setInterval(function(){myScroll();},100);
}

function myScroll(){
	var inframe = document.getElementById("inframe");
	inframe.style.top  = (eval(inframe.style.top.replace("px","")) - 4)  + 'px'
	num = num + 1;
	if (num == endNum){
		endNum = endNum + 18;
		clearInterval(timer1);
		clearInterval(timer0);
		if(num == maxNum){
			inframe.style.top = "0px";
			num = 0;
			endNum = 18;
		}
		timer0=setInterval(function(){setScrollTimer();},3000);
	}
}