// JavaScript Document



function scrollUpStart(){
	var scrollingUp = true;
}

function scrollDownStart(){
	var scrollingDown = true;
}

function scrollStop(){

}

function scrollUp(){
	_scroll( document.getElementById("idTextblock"), -1 );
}

function scrollDown(){
	_scroll( document.getElementById("idTextblock"), 1 );
}

function _scroll( o, dir ){


/*
alert("scroll=" + o.scrollTop );
alert("offset=" + o.offsetLeft+"-" + o.offsetTop );
o.offsetTop = 190;
return;
*/

if ( typeof o.scrollTop!= 'undefined') 
			{
//					alert("test " +amnt+ ":"+o.scrollTop );
	//				return;
			if ( o.scrollTop >= 0) 
					{
					amnt = o.scrollTop;
					for (j = 1; j <= 7; j++){		
						for (i = 1; i <= 20; i++){
								amnt=amnt + dir;
								o.scrollTop=amnt;
								}
						}
					}
					else
					{
						//safari na 1 keer klikken
					alert("DEF but NOK = " + o.scrollTop );
					o.scrollTo(100,100);
					return;
					}
			}
			else
			{
			alert("UNDEF NOK");
			o.scrollTo(100,100);
			return;
			}
}