var scroll_repeat_id = 0;
function startscroll(direction) {
	switch(direction) {
		case "up" : scroll_repeat_id = window.setInterval(scrollup,10); break;
		case "down" : scroll_repeat_id = window.setInterval(scrolldown,10); break;
	}
}
function stopscroll() {
	//alert(">>"+scroll_repeat_id);
	window.clearInterval(scroll_repeat_id);
}
function scrollup() {
	var content_elmt = document.getElementById("content");
	var current_pos = content_elmt.style.top;
	if( current_pos=="" )
		current_pos = 0;
	else
		current_pos = current_pos.replace(/px/,"") - 0;
	//alert(typeof(current_pos));
	//alert(current_pos);
	if( current_pos < 0 )
		content_elmt.style.top = (current_pos + 1) + "px";
}
function scrolldown() {
	var content_elmt = document.getElementById("content");
	var current_pos = content_elmt.style.top;
	if( current_pos=="" )
		current_pos = 0;
	else
		current_pos = current_pos.replace(/px/,"") - 0;
	content_elmt.style.top = (current_pos - 1) + "px";
}
function openpicture(url,windowName,features) {
  window.open(url,windowName,features);
}