/* FUNCTIONS */

var isIE_PNG = (navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf('Opera') == -1);

function Popup(path,name,width,height,scrolling,resizable)
 {
   window.open(path,name,"width="+width+",height="+height+",scrollbars="+scrolling+",resizable="+resizable);
 }

var isMoving = false;
var inMove = false;
var element = "frame";
var refreshRate = 20;
var space = 3;
var maxi = 0;

function checkArrows() {

   frameNode = document.getElementById('frame');
   arrowUpNode = document.getElementById('content_up');
   arrowDownNode = document.getElementById('content_down');


   if(frameNode && arrowUpNode && arrowDownNode) {
   	if(frameNode.parentNode.offsetHeight < frameNode.offsetHeight) {
      	arrowUpNode.style.display = "block";
         arrowDownNode.style.display = "block";
         maxi = frameNode.parentNode.offsetHeight-frameNode.offsetHeight;
      }
   }
}

function startMove(direction) {
//	document.write("lol");
	isMoving = direction;
   if(!inMove) {
   	inMove = true;
	   window.setTimeout("move('"+direction+"')",refreshRate);
   }
}

function stopMove() {
	isMoving = false;
}

function move(direction) {

	if(isMoving == direction) {

	   d = document.getElementById(element);

      var left = d.style.top;
		left = left.substring(0,left.length-2)*1;


      if(direction == "up") {
			left -= space;
		} else {
			left += space;
		}


      if(left > 0) {
      	left = 0;
      } else if(left < maxi) {
      	left = maxi;
      }


		d.style.top = left + "px";

		window.setTimeout("move('"+direction+"')",refreshRate);

	}
   inMove = false;
}