var alt=1, nilai=4;
var tinggi;
var currentpos=0 ;


function ScrollMoveDown() {
	if (currentpos<=(parent.content.document.body.scrollHeight-200)) { 
		currentpos = currentpos + nilai 
	}; 
	window.parent.content.scroll(0,currentpos)
}


function FastScroll() {
	nilai = 14 ;
}
	
function NormalScroll() {
	nilai = 4 ;
}


function ScrollMoveUp(){
	if (currentpos >= nilai) { 
		currentpos = currentpos - nilai 
	};
	window.parent.content.scroll(0,currentpos)
}


function ScrollUp() {
	detik = setInterval("ScrollMoveUp()",alt)
}


function ScrollDown() {
	detik = setInterval("ScrollMoveDown()",alt)
}


function StopScroll() {
	clearInterval(detik) 
}