function get_scroll_position() {
 var scroll_x = 0, scroll_y = 0;
 if (typeof( window.pageYOffset ) == 'number') { // Netscape
  scroll_y = window.pageYOffset; scroll_x = window.pageXOffset;
 }
 else if (document.body && (document.body.scrollLeft || document.body.scrollTop)) { // DOM
  scroll_y = document.body.scrollTop; scroll_x = document.body.scrollLeft;
 }
 else if (document.documentElement && (document.documentElement.scrollLeft || document.documentElement.scrollTop)) { // IE6
  scroll_y = document.documentElement.scrollTop; scroll_x = document.documentElement.scrollLeft;
 }
 return scroll_y;
}

function get_scroll_period(seconds,height) {
	var y=get_scroll_position();
	for(var i=0;i<Math.round(y/height+5);i++) {
		try {
			document.getElementById('profil'+profil_bilder[i]).className='profil_editform';
			document.getElementById('profilbild'+profil_bilder[i]).src='/bilder/thumbs/'+profil_bilder[i]+'.jpg';
		} catch(e) {}

	}
	
	window.setTimeout('get_scroll_period('+seconds+','+height+');',seconds);
}