function get_vertical_scroll()
{
	if( window.pageYOffset )
		return window.pageYOffset;
	else if ( ( document.documentElement ) && ( document.documentElement.scrollTop ) )
		return document.documentElement.scrollTop;
	else if ( ( document.body ) && ( document.body.scrollTop ) )
		return document.body.scrollTop;
	else
		return 0;
}

function Scroll( )
{
	object = document.getElementById('mediumimagediv');
	if(get_vertical_scroll() < 154)
		object.style.top = "154px";
	else if(get_vertical_scroll() > document.getElementById('prodlist-td1').offsetHeight-document.getElementById('mediumimage').height+75)
		object.style.top = document.getElementById('prodlist-td1').offsetHeight-document.getElementById('mediumimage').height+75 + "px";
	else
		object.style.top = ( get_vertical_scroll( ) + 10 ) + "px";
	setTimeout( function(){ Scroll(); }, 0 );
}