//	setInterval ( "advDiv.top=window.pageYOffset;", 500 );
//	setInterval ( "alert(window.pageYOffset);", 2000 );

function checkScrollPos()
{
	var sctOfX, scrOfY;

	if( typeof( window.pageYOffset ) == 'number' ) 
	{ 
		scrOfY = pageYOffset; 
		scrOfX = pageXOffset; 
	} 
	else 
	{
		if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) 
		{ 
			scrOfY = document.body.scrollTop; 
			scrOfX = document.body.scrollLeft; 
		} 
		else 
		{
			if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) 
			{ 
				scrOfY = document.documentElement.scrollTop; 
				scrOfX = document.documentElement.scrollLeft; 
			} 
		}
	}

	if (typeof( scrOfY ) != "number")
	{
		scrOfY = 0;
	}
	document.getElementById('advDiv').style.top=scrOfY+10+"px";

//	window.status = scrOfY + " :: "+ typeof( scrOfY );
}	
	setInterval ( "checkScrollPos();", 100 );